Can McCain be trusted?

I do not ;like the way his politics are run..Like the terrorist thing he brings up..This so called terrorist is now a respected professor at a community collage in Chicago..he has also paid his debt to society..McCain keeps bringing this up even through it is settled..This is all he has in the way of politics.If he would go to the table with Putin we would be at war.He should be focused on the need to fix our problem like Obama....Bringing up the past wife ,past of many years ago,, i think is a poor idea...Let's stick to politics to get the job done..If you hire a plumer ,are you going to ask if he cheats on his wife