Chamber launches ad attacking McCaskill for voting against GOP tax law

The U.S. Chamber of Commerce on Friday released an ad attacking Sen. Claire McCaskillClaire Conner McCaskillNelson campaign to donate K from Al Franken group to charity 'Kavanaugh' chants erupt at Trump rally in Missouri The Hill's Morning Report — Sponsored by United Against Nuclear Iran — Kavanaugh, accuser say they’re prepared to testify MORE (D-Mo.) for her vote against the GOP tax law, as Republicans seek to oust the vulnerable Dem in the midterm elections.

"It's called the Tax Cuts and Jobs Act. It's brought more jobs, lower taxes, and bigger paychecks for Missouri," a narrator says in the ad. "But Sen. Claire McCaskill didn't want it, voting against all the good that's happening."

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The ad, from the Chamber's political arm, also urges voters to tell McCaskill, a member of the tax-writing Senate Finance Committee, to support making the tax cuts permanent. The tax law's changes to the individual tax code expire after 2025, and House Republicans are planning to vote this fall on legislation to cement them, though the Senate may not follow suit.

The Chamber's ad, which the group said will run on broadcast and cable platforms as well as online, comes less than three months before the midterm elections. McCaskill is being challenged by Missouri Attorney General Josh Hawley (R) in a race that the nonpartisan Cook Political Report rates a "toss-up."

President TrumpDonald John TrumpGrassley: Dems 'withheld information' on new Kavanaugh allegation Health advocates decry funding transfer over migrant children Groups plan mass walkout in support of Kavanaugh accuser MORE easily won the Show Me State by more than 18 points in the 2016 presidential election.

Republicans are seeking to increase their majority in the Senate, where McCaskill is one of 10 Democratic senators up for reelection in states that Trump carried in 2016. They hope that the economy and the tax law will be an asset to them.

But Democrats argue that the tax law mainly benefits wealthy individuals and large corporations. Polls have generally shown that the tax law is unpopular, with a Fox News poll released this week finding that ObamaCare is more popular than it.

McCaskill's campaign released a "fact check" of the ad, arguing that the senator has a record of working with Republicans on tax reform and creating jobs but that the law "was a massive tax giveaway to big corporations and pharmaceutical companies at the expense of the middle class."

“D.C. dark money donors are desperate to mislead Missourians and keep Josh Hawley’s campaign afloat because they know he will be a reliable vote for their agenda of supporting corporate bosses instead of workers," McCaskill campaign press secretary Eric Mee said in a statement. "Hard-working Missourians want someone who will work across party lines to put their priorities first — just as Claire has done."

The Chamber has also run an ad in Florida hitting vulnerable Sen. Bill NelsonClarence (Bill) William NelsonNelson campaign to donate K from Al Franken group to charity Political shenanigans mask true problems in Puerto Rico The Hill's Morning Report — Sponsored by United Against Nuclear Iran — The Hill interviews President Trump MORE (D) for voting against the tax law and praising Republican candidate Rick Scott for cutting taxes as the state's governor. Additionally, the group has run ads in several House districts with vulnerable GOP lawmakers, touting their backing of the tax law.