Senate Dems tie vulnerable Republicans to Trump in new ad
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The campaign arm of Senate Democrats launched its first paid advertisement Tuesday, aiming to tie vulnerable Republican incumbents and upstart Senate challengers to GOP presidential front-runner Donald TrumpDonald John TrumpO’Malley tells Dems not to fear Trump Right way and wrong way Five things to know about the elephant trophies controversy MORE.

The Democratic Senatorial Campaign Committee (DSCC) ad intersperses clips of some of Trump’s incendiary remarks — with a lot of foul language bleeped out — with clips of incumbents and House members running for Senate saying they’ll support Trump if he’s the party’s nominee.

Among those who make an appearance: Sens. John McCainJohn Sidney McCainTrump's dangerous Guantánamo fixation will fuel fire for terrorists Tech beefs up lobbying amid Russia scrutiny Ad encourages GOP senator to vote 'no' on tax bill MORE (Ariz.), Rob PortmanRobert (Rob) Jones PortmanGOP defends Trump judicial nominee with no trial experience Bipartisan compromise is vital to the legislative process Senate GOP reveals different approach on tax reform MORE (Ohio), Kelly AyotteKelly Ann AyotteExplaining Democratic victories: It’s gun violence, stupid Trump voter fraud panel member fights back against critics Dems plan to make gun control an issue in Nevada MORE (N.H.), Richard BurrRichard Mauze BurrOvernight Energy: Chemical safety regulator's nomination at risk | Watchdog scolds Zinke on travel records | Keystone pipeline spills 210,000 gallons of oil Overnight Regulation: Senators unveil bipartisan gun background check bill | FCC rolls back media regs | Family leave credit added to tax bill | Senate confirms banking watchdog Collins ‘leaning against’ Trump EPA chemical nominee MORE (N.C.), Mark KirkMark KirkHigh stakes as Trump heads to Hill Five things to watch for at Trump-Senate GOP meeting Giffords, Scalise highlight party differences on guns MORE (Ill.), Pat Toomey (Pa.), Roy BluntRoy Dean BluntGOP senator: Capitol Hill's sexual harassment reporting protocol is 'totally inappropriate' Senate passes resolution requiring mandatory sexual harassment training Strange bedfellows on criminal justice reform could offer Trump a legislative win MORE (Mo.), and Ron JohnsonRonald (Ron) Harold JohnsonAlabama election has GOP racing against the clock Tax bills speed up global tax race to the bottom Someone besides the president should have the nuclear codes MORE (Wis.).

Portman, Ayotte, Kirk, Toomey and Johnson all face tough reelection prospects in a presidential year, when turnout could favor Democrats. Kirk and Johnson are the most endangered of the bunch, while Portman, Ayotte and Toomey are running in hotly contested swing states.

Also in the ad are Reps. Joe Heck (Nev.), who is running for the seat being vacated by Sen. Harry ReidHarry ReidVirginia was a wave election, but without real change, the tide will turn again Top Lobbyists 2017: Grass roots Boehner confronted Reid after criticism from Senate floor MORE (D-Nev.), and David Jolly (Fla.) and Ron DeSantis (Fla.), who are in a crowded primary running for the seat being vacated by Sen. Marco RubioMarco Antonio RubioCongress faces growing health care crisis in Puerto Rico The Hill's 12:30 Report Colbert mocks Trump for sipping water during speech on Asia trip MORE (Fla.).

“Republicans running for U.S. Senate, running with Trump,” text from the ad states.

It then cuts to Trump saying: “What the hell are we doing?”

“Exactly,” the ad concludes.

The DSCC says the ad is the first in what will be a “sustained campaign” across television, radio and social media meant to tie Republicans running for Senate to the controversial GOP front-runner.

Democrats have a good chance of taking back the Senate in 2016 after losing their majority in the last cycle.

Republicans are defending 24 seats, compared to only 10 for Democrats. If Democrats net five seats, they’ll win back the Senate.

Many Republicans up for reelection are running in states President Obama carried in 2008 or 2012.