The Club for Growth Political Action Committee is back to save one of its own — and at least one Republican isn’t happy about it.

After supporting now-Rep. Tim Walberg in the 2006 Republican primary over moderate then-Rep. Joe Schwarz, the club is back to boost his candidacy in a competitive general election contest against state Sen. Mark Schauer (D) with a $175,000 ad buy on broadcast and cable in the Lansing market.

The 30-second spot is titled “Crazy” and focuses on what the club calls Schauer’s record of voting for tax increases in the state Legislature.

“In the State Legislature, Mark Schauer voted to raise taxes non-stop,” Club for Growth President Pat Toomey said in a statement. “So why should voters in Michigan send him to Congress? No doubt, he will vote to raise taxes in Congress just as much if not more.”

The buy prompted Schwarz to tell the Associated Press on Tuesday that he has decided to endorse Schauer in the competitive southern Michigan race.

The former Congressman said he couldn’t keep neutral any more, calling the club’s participation in the race “the straw that broke the camel’s back.”

A spokesman for Schauer’s campaign, Zack Pohl, also responded to the club’s advertisement by saying the state could not afford the group’s “dangerous economic policies.”

“Club for Growth supports unfair trade deals and wants to privatize Social Security, and after Walberg admitted he was ‘bought and paid for by them,’ it’s not surprising that the group is so desperate to save the seat they spent $1.1 million on two years ago,” Pohl said.