The Club for Growth Action announced Monday it is spending about $2 million on ads in Illinois against GOP presidential front-runner Donald TrumpDonald TrumpManafort-linked accounts on Cyprus probed: report Republican failure Trump's environmental order jeopardizes our national security MORE.
David McIntosh, the group's president, argued that "momentum is shifting away" from Trump following his losses to Sen. Ted CruzTed CruzWounded Ryan faces new battle The mystery of Ivanka Trump Conservatism's worst enemy? The Freedom Caucus. MORE (R-Texas) over the weekend in Kansas and Maine. Cruz and Trump also tied for delegates in Louisiana's primary.
"Republican voters don’t want a big-government liberal like Donald Trump at the top of the GOP ticket," McIntosh said.
"They know that Trump would cost Republicans the White House, the Senate majority, and, ultimately, the Supreme Court. It will be no surprise to see the numbers tighten in tomorrow’s primaries and caucus."
McIntosh then called the front-runner out for his "far-left positions on taxes, health care, bailouts and the abuse of eminent domain" before making a reference to Trump's satement in Thursday's debate that he was changing his position on green cards for high-skilled workers.
"And now he sounds like the worst kind of politician, warning voters that he will change positions when he feels like it," McIntosh said.
"The shell game that is the Trump candidacy needs to be stopped.”