Photo Illustration by Luis G. Rendon/The Daily Beast/Getty ImagesPay Dirt is a weekly foray into the pigpen of political funding. Subscribe here to get it in your inbox every Thursday.As the impeachment inquiry into the Biden family’s business dealings came crashing down around his ears, House Oversight chair James Comer—who for months has made overblown claims about the Bidens’ limited liability companies—was launching an opaque new LLC of his own.Comer registered the new company, called “Gamal