The Fed should have raised rates on March 16. It is a lost opportunity. They probably can only raise rates once this year now. It has to be done before September as the election is too close for them to do it in September and be accused of influencing the election. They are all democrats so they wouldn't want to hurt Hillary Clinton's chances in any way anyway.
Can they raise rates in December regardless of who is elected November? Good question. If it is Trump they will probably go for a .5% hike to kill the stock market and make it look like Trump being elected was at fault.