The Constitution says there shall be NO religious test for any position in the govt. Does our side throw the Constitution under the bus when it suits us? People tried to go in this direction when Catholics were new arrivals and their loyalty was suspected.
True, but that simply means that a person can not be "constitutionally" barred because of their religion, which would mean they couldn't even be nominated in the first place. Individual Senator's can choose not to vote for a nominee for any reason they see fit, or for no reason at all, heck a Senator is free to vote against every nominee with brown hair if he or she so chooses.