Rep. Steve King (R-Iowa) says Karl Rove and American Crossroads are out to get him and his supporters should pony up to stop them.

Keying off a quote from Crossroads President Steven Law in Sunday’s New York Times, the likely Iowa Senate candidate sent an email to supporters Thursday seeking cash for a potential campaign.

“I have not made a decision on this matter, but already Karl Rove and his army have launched a crusade against me,” King writes. …

“They said I couldn’t win in 2012 — the entire political machine was against me — but I soundly defeated my opponent by 8 percentage points,” he writes. “So let me be clear. Nobody can bully me out of running for the U.S. Senate, not even Karl Rove and his hefty war chest.”