Steyer starts ads in Iowa Senate race

Billionaire environmental activist Tom SteyerTom SteyerYouth voting organization launches M registration effort in key battlegrounds Overnight Energy: 'Eye of fire,' Exxon lobbyist's comments fuel renewed attacks on oil industry | Celebrities push Biden to oppose controversial Minnesota pipeline | More than 75 companies ask Congress to pass clean electricity standard Celebrities push Biden to oppose controversial Minnesota pipeline MORE stepped into Iowa’s U.S. Senate race Wednesday with an advertisement that accuses Joni ErnstJoni Kay ErnstFive things to know about Russia's troop buildup near Ukraine  As democracy withers, Bob Dole and other American soldiers must be remembered Ernst on Russian buildup on Ukraine border: 'We must prepare for the worst' MORE of supporting companies that send jobs overseas.

The TV ad released by Steyer’s NextGen Climate group featuring two men discussing the fact that Ernst has pledged never to vote to raise taxes. The pledge is part of an ongoing campaign by Grover Norquist’s Americans for Tax Reform, and NextGen says it protects tax breaks for moving jobs out of the country.

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NextGen said the ad launched Wednesday is part of a $2.6 million campaign the group is planning in Iowa over the next five weeks. Other ads will tie Ernst to the oil industry, the conservative billionaire Koch brothers and unpopular special interests.

“The tax breaks that thing protects are gold,” one man says in the first ad. “More outsourcing. China, Mexico, all the way.”

The men later confirm that Ernst “doesn’t care about Iowa jobs.”

“The ad urges Iowans to demand Ernst take back her pledge to protect special interests and start putting Iowa's families first,” NextGen said in a statement.

Ernst is running against Rep. Bruce Braley (D) for the seat being vacated by Sen. Tom Harkin (D).

Steyer has pledged to spend up to $100 million in this election cycle on candidates who support environmental causes.