The Club for Growth Action announced Monday it is spending about $2 million on ads in Illinois against GOP presidential front-runner Donald TrumpDonald John TrumpDems flip Wisconsin state Senate seat Sessions: 'We should be like Canada' in how we take in immigrants GOP rep: 'Sheet metal and garbage' everywhere in Haiti MORE.

The ads, which will air on statewide broadcast and cable TV in Illinois and had previously aired in Iowa, attack Trump for having a liberal record and for his position on eminent domain.
 
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It's the largest anti-Trump ad buy yet by Club for Growth Action, which has emerged as a leading critic of the businessman.

David McIntosh, the group's president, argued that "momentum is shifting away" from Trump following his losses to Sen. Ted CruzRafael (Ted) Edward CruzWith religious liberty memo, Trump made America free to be faithful again Interstate compacts aren't the right way to fix occupational licensing laws Texas Dem: ‘I don’t know what to believe’ about what Trump wants for wall 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.”