Two Senate Democrats recently sent a letter to the attorney for Supreme Court Justice Clarence Thomas asking for clarification on a loan from a wealthy Republican donor, saying the justice has not been forthcoming about whether he’s satisfied both ethical reporting requirements and federal tax obligations. The New Republic’s Greg Sargent wrote Thursday that Democrats are trying to get to the bottom of whether Thomas paid back the principal for a loan of $267,000 by businessman Anthony Welters to purchase a luxury recreational vehicle. Welters has said the loan has since been “satisfied,” but i…