Today’s announcement that former Citi executive and Obama Harvard Law buddy Michael Froman had joined the White House team as a member of the National Security Council, advising on global finance issues, has some Republicans in the Senate minority leadership wondering if it’s a hire worth investigating further.

Froman helped direct a Citi hedge fund and focused on infrastructure investments. “Beyond being Barack Obama’s best friend at Harvard, if that Citi job is something that folks over at the White House think makes him an attractive choice, maybe we need to look into just what he did at Citi that contributed to the mess we’re in. That’s a national security issue, for sure,” says the GOP aide.