Not according to this List of current members of the United States Congress by wealth.
You believe he reports all of his income.
McCaul’s estimated net worth in 2011 was around $294 million.
McCaul is not in the Quiver Quantitative tracking tool:
https://www.quiverquant.com/congress-live-net-worth/
But his estimated net worth is at the following:
https://en.wikipedia.org/wiki/Michael_McCaul#Personal_life
https://www.opensecrets.org/personal-finances/michael-mccaul/net-worth?cid=N00026460&year=2017