It was a brave move for Democratic Senator Chuck Schumer to stand against President Obama's prized deal with Iran over nuclear arms, but moments after Schumer announced his opposition, a top liberal advocacy group was calling for retribution, reports The Washington Post:

Within minutes of Sen. Chuck Schumer’s announcement Thursday night that he will oppose President Obama’s nuclear deal with Iran, progressive advocacy group MoveOn — which has been lobbying in support of the deal — urged its eight million members to withhold campaign contributions from Democratic candidates against the deal.

According to The Post, the group aims to seek up to $10 million in donations that can be held back against wayward Democrats that dare to stand against Obama and his deal:

“We will organize grassroots progressives across the country to withhold campaign contributions from the Democratic Senatorial Campaign Committee and from any Democratic candidate who succeeds in undermining the president’s diplomacy with Iran,” MoveOn said in a statement. “Our goal will be to secure commitments to withhold $10 million in contributions within 72 hours after this campaign launches.”

MoveOn is also promising to spend a six-figure sum on radio, TV and online ads in support of the deal and against those opposed.