As Obama's presidency winds down, one of the stranger stories to emerge has been the impeachment, or more accurately the Republicans threatening impeachment but not really meaning it, saga. Impeaching a president is difficult as it requires a vote by the House of Representatives followed by a trial and vote by the Senate. Two presidents, Andrew Johnson and Bill Clinton, have been impeached. Neither were convicted by the senate. As long as the Democrats retain control of the senate, or have close to fifty votes there, it is almost certain that efforts to impeach Obama would lead to the same result.