Rep. Michael McCaul (R-Texas) is thinking about running for the Senate, according to The Texas Tribune, an Austin-based online news source.

While he is not well-known statewide, McCauls personal wealth and family connections could make him a serious contender for the seat. According to the report, McCaul is telling potential supporters he is willing to spend $4 million to $6 million on a race.

McCauls father-in-law, Clear Channel Communications Chairman Lowry Mays, is a major Republican donor who helped McCaul get endorsed by Texas Republican luminaries including former President George H.W. Bush, Gov. Rick Perry and Sen. Kay Bailey Hutchison in a competitive 2004 primary.

McCaul would enter an already-crowded GOP primary to replace the retiring Hutchison. Lt. Gov. David Dewhurst, former Texas Solicitor General Ted Cruz and former Dallas Mayor Tom Leppert are already in the race.