Supreme Court Justice Clarence Thomas is coming under scrutiny over his participation in a 2008 political retreat organized by Charles and David Koch, the billionaire brothers who have helped bankroll the Tea Party movement. A court spokeswoman originally said he had only made a brief drop by at the event. But newly disclosed financial records show that the Federalist Society had reimbursed Thomas for four days of “transportation, meals and accommodations” over the weekend of the retreat. The watchdog group Common Cause has questioned whether Thomas should have disqualified himself from last year’s landmark Citizens United v. Federal Election Commission because of his ties to the Koch brothers. The news comes just a week after Thomas’s wife formed a right-wing lobbying group in an effort to become the “ambassador to the Tea Party movement.”