Here are the facts: The Constitution gives the President the authority to make temporary recess appointments to fill vacant positions when the Senate is in recess, a power all recent Presidents have exercised. The Senate has effectively been in recess for weeks, and is expected to remain in recess for weeks. In an overt attempt to prevent the President from exercising his authority during this period, Republican Senators insisted on using a gimmick called “pro forma” sessions, which are sessions during which no Senate business is conducted and instead one or two Senators simply gavel in and out of session in a matter of seconds. But gimmicks do not override the President’s constitutional authority to make appointments to keep the government running. Legal experts agree. In fact, the lawyers who advised President Bush on recess appointments wrote that the Senate cannot use sham “pro forma” sessions to prevent the President from exercising a constitutional power.

According to reports from the Congressional Research Service, during their time in office President Ronald Reagan made 240 recess appointments, President George H. W. Bush made 77 recess appointments, President Bill Clinton made 140 recess appointments, and George W. Bush made 171. Obama's first term has seen a paltry 28.

There had been debate over whether Mr. Obama could have avoided a constitutional challenge by making the appointment on Tuesday in the short window between the end of the first and beginning of the second session of the 112th Congress. By moving ahead after the new session started, the president may have provided Republicans a chance to argue that, technically, the recess appointment was invalid.