U.S. Reps. Lloyd Doggett and Sylvia Garcia of Texas are pushing an inquiry into whether deals between several prominent law firms’ and President Donald Trump constituted the bribe of a government official.

The pair joined 14 other Democratic members in penning letters to nine large firms on Thursday, several of which have offices in Texas, requesting details on how their deals with Trump came together and what exactly they agreed to in order to maintain access within the federal government.

Trump reached the agreements with some of the nation’s largest firms after he issued executive orders taking away their attorneys’ security clearance and barring government agencies from working with them. Many of those orders were revoked after firms agreed to provide tens of millions of dollars worth of pro bono legal work for causes important to Trump, as well as refraining from hiring practices designed to promote “diversity, equity and inclusion.”