The Environmental Protection Agency’s new rule on carbon pollution is the latest headache for Democrats trying to defend a fragile Senate majority.

Republicans seized on the Obama administration’s call for power plants to cut their carbon emissions 30 percent by 2030 as an opportunity to attack Democrats from energy-producing states — some of the party’s most vulnerable — for what they characterized as the party’s job-killing energy policies and overreach from the president.

The National Republican Senatorial Committee is launching a robocall campaign hitting Democratic Sens. Mary LandrieuMary LandrieuCNN producer on new O'Keefe video: Voters are 'stupid,' Trump is 'crazy' CNN's Van Jones: O'Keefe Russia 'nothingburger' video 'a hoax' Trump posts O'Keefe videos on Instagram MORE (La.), Mark WarnerMark WarnerDem senator: Pardoning targets of Russia probe would be 'crossing a fundamental line' Juan Williams: Trump's war on U.S. intelligence Questions grow over Kushner’s security clearances MORE (Va.), Mark UdallMark UdallDemocratic primary could upend bid for Colorado seat Picking 2018 candidates pits McConnell vs. GOP groups Gorsuch's critics, running out of arguments, falsely scream 'sexist' MORE (Colo.) and Mark BegichMark BegichPerez creates advisory team for DNC transition The future of the Arctic 2016’s battle for the Senate: A shifting map MORE (Alaska) on the new rule.

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Even Republican candidates in states where the proposal is likely to have minimal impact, like Michigan, went on the attack. There, Republican Senate candidate Terri Lynn Land knocked the proposal as an “enormous regulatory attack on coal,” and called on Rep. Gary Peters, the Democratic nominee for Senate, to oppose it.

But Democrats are doing their best to turn the issue into an asset. Kentucky Democratic Senate candidate Alison Lundergan Grimes lambasted the proposal and launched an advertising campaign declaring her opposition to Obama’s policies on coal.

Vulnerable Rep. Nick RahallNick RahallLikely W.Va. Senate GOP rivals spar in radio appearances West Virginia is no longer Clinton country Solution needed: Rail congestion is stifling economic growth MORE (D-W.Va.) has been speaking out against the rule for weeks, and on Monday announced plans to introduce legislation to block its implementation.

And green groups, a key Democratic constituency and one that could have a pivotal role in this fall’s elections, were elated. League of Conservation Voters President Gene Karpinski lauded the new rule as “the biggest step we’ve ever taken for the biggest challenge we’ve ever faced.”

 

SENATE SHOWDOWN 

DEM SUPER-PAC LAUNCHING NEW ATTACKS: The Senate Majority PAC is out with new ads attacking GOP candidates in ArkansasColoradoMichiganNorth Carolina and New Hampshire.

TEA PARTY DEFENDS THE KOCHS: Tea Party Patriots has filed a complaint against Senate Majority Leader Harry ReidHarry ReidConservative Senate candidate calls on GOP to end filibuster Ex-Reid aide: McConnell's 'original sin' was casting ObamaCare as 'partisan, socialist takeover' GOP faces growing demographic nightmare in West MORE (D-Nev.) with the Senate Ethics Committee to protest his repeated attacks against Charles and David Koch.

NRSC HITS DEMS ON EPA RULE: The National Republican Senatorial Committee (NRSC) is launching a robocall campaign tying Democratic Sens. Mary Landrieu (La.), Mark Warner (Va.), Mark Udall (Colo.) and Mark Begich (Alaska) to Monday’s proposed carbon emissions limits for power plants.

KY-SEN (MCCONNELL): Kentucky Democratic Senate candidate Alison Lundergan Grimes is hitting President Obama on coal with a six-figure, multimedia campaign that launched this week with ads placed in newspapers in the state’s top coal-producing regions.

MS-SEN (COCHRAN): State Sen. Chris McDaniel picked up a last-minute endorsement from the Family Research Council’s political action committee this weekend in his primary challenge to Sen. Thad CochranThad CochranOvernight Finance: GOP offers measure to repeal arbitration rule | Feds fine Exxon M for Russian sanctions violations | Senate panel sticks with 2017 funding levels for budget | Trump tax nominee advances | Trump unveils first reg agenda Senate committee ignores Trump, House budgets in favor of 2017 funding levels Overnight Finance: CBO finds 22M more uninsured under Senate health bill | GOP agrees ObamaCare taxes must go | Supreme Court to look at Dodd-Frank whistleblower protections | More tax reform hearings | Green light for partial travel ban | MORE (R-Miss.). Meanwhile, a murky group placed an ad in an African-American weekly newspaper that pitches Democratic voters on jumping in the GOP primary to vote for Cochran.

IA-SEN (OPEN): Sen. Marco RubioMarco RubioBush ethics lawyer: Congress must tell Trump not to fire Mueller The private alternative to the National Flood Insurance Program  Cruz offers bill to weaken labor board's power MORE (R-Fla.) is in Iowa this evening to stump with with Iowa state Sen. Joni Ernst (R), the latest big-name Republican to help her campaign ahead of tomorrow’s primary.

Ernst has a big primary lead in recent polling.

NH-SEN (SHAHEEN): The Boston Globe has a new report outlining Republican Scott Brown’s murky income sources since leaving the Senate in 2013, highlighting in particular his lucrative ties to an apparent firearms manufacturer that hasn’t sold or made any guns and experts say could raise red flags with its business practices.

OK-SEN (OPEN): A group backing Rep. James Lankford in the Oklahoma Senate primary released a new poll, conducted by Randall Gutermuth for the Foundation for Economic Prosperity, that shows Lankford up over former state Speaker T.W. Shannon by 22 points, with 48 percent support among likely GOP primary voters to 26 percent for Shannon. Both are seen positively by about two-thirds of respondents.

AR-SEN (PRYOR): Sen. Cory Booker (D-N.J.) stumped with Sen. Mark PryorMark PryorMedicaid rollback looms for GOP senators in 2020 Cotton pitches anti-Democrat message to SC delegation Ex-Sen. Kay Hagan joins lobby firm MORE (D-Ark.) over the weekend, slamming Rep. Tom CottonTom CottonCruz offers bill to weaken labor board's power Overnight Finance: GOP offers measure to repeal arbitration rule | Feds fine Exxon M for Russian sanctions violations | Senate panel sticks with 2017 funding levels for budget | Trump tax nominee advances | Trump unveils first reg agenda Iran deal faces uncertain future under Trump MORE’s (R-Ark.) vote against federal disaster relief funding.



BATTLE FOR THE HOUSE

FLOTUS SAYS HOUSE FLIP 'DOABLE': First lady Michelle ObamaMichelle ObamaBudowsky: Dems need council of war The Hill's 12:30 Report Michelle Obama gets standing ovation at ESPYs MORE headlined a Massachusetts fundraiser for the Democratic Congressional Campaign Committee, and expressed optimism at the party’s chances of picking up the 17 seats it needs to take back the House. "That's a doable number," she said, if Democrats turn out this fall.

The DCCC on Monday launched Web ads accusing House Republicans of voting to keep taxpayer-funded lifetime healthcare for themselves. 

SCOTUS TO HEAR ALABAMA MAP CHALLENGE: The U.S. Supreme Court agreed Monday to hear a pair of challenges to Alabama’s legislative map from groups who accuse the state’s GOP-dominated legislature of racial gerrymandering.

CA-17 (HONDA): A union-backed PAC has been sending mailers attacking Democrat Ro Khanna and boosting Republican Vanila Singh (R) on the long-shot chance they can push her above him and help Rep. Mike Honda (D-Calif.) in the general election.

MI-3 (AMASH): Rep. Justin AmashJustin AmashDem rep polls Twitter followers on whether a hot dog is a sandwich Dems launch ‘no confidence’ resolution against Trump House passes 6.5B defense policy bill MORE (R-Mich.) leads primary challenger Brian Ellis (R) by 42 percent to 23 percent in a new poll conducted by MIRS.

NY-1 (BISHOP): American Action Network is launching television and cable ads tying businessman George Demos, battling state Sen. Lee Zeldin for the GOP nod in New York’s 1st District, to House Minority Leader Nancy Pelosi (D-Calif.). The two are vying for the chance to take on vulnerable Democratic Rep. Tim BishopTim BishopDems separated by 29 votes in NY House primary Flint residents hire first K Street firm House moves to vote on .1T package; backup plan in place MORE.

NY-13 (RANGEL): House Minority Leader Nancy Pelosi (D-Calif.) endorsed incumbent Rep. Charles Rangel (D-N.Y.) on Monday as he fights to hold his seat against a primary challenger.



2016 WATCH

CLINTON: Hillary ClintonHillary Rodham ClintonDem senator: Pardoning targets of Russia probe would be 'crossing a fundamental line' Trump officials: Russia meddled in the election Trump lawyers asking about presidential pardon powers: report MORE visited a Denver plastics factory on Monday, prior to a planned speech in the state that night, to chat with representatives from local small businesses and Denver public schools about training and recruitment programs for workers. Later this month, on June 10, she'll begin a nationwide book tour at a Barnes & Noble in New York City. She’s planning stops in Los Angeles, Chicago, Washington, D.C., Canada and Texas.

CAIN: Businessman Herman Cain, who dropped his 2012 presidential bid amid scandal surrounding his multiple affairs, left the door open this weekend to another run. “I do not know what the future holds, but I know who holds the future,” he said, "and I trust in God.”

PAUL: Sen. Rand PaulRand PaulOvernight Healthcare: CBO predicts 22M would lose coverage under Senate ObamaCare replacement Fox News personality: GOP healthcare plan says ‘ideology is less important than victory' Rand Paul opens door to backing healthcare bill on key hurdle MORE (R-Ky.) is heading to Texas to keynote the state’s Republican Party Convention, the latest state convention the 2016 prospect has headlined.


QUOTE OF THE DAY 

“The president’s plan is nuts. There’s really no more succinct way to describe it.”

 Speaker John Boehner (R-Ohio) on President Obama’s new carbon regulations