Does it make a difference if they are both there?...maybe not, but I think both Democrat and Republican members of Congress want the 2 guys who may be in the next president suit..to have their signature on the bill...no going back and blaming the other party if it fails miserably
should they be there? Yes --they are elected officials who have a duty to their constuents to represent them
Was it a political move on McCains part? - yes - he one upped Obama - Obama's staff blew it, McCains staff was a little more politically astute in the reaction..
Will it backfire on McCain? maybe, looks like a grandstanding play on his part, also will be bad if he can't "lead" his Republican forces to come to a bipartisan agreement...also spinning it as McCain worried he is looking bad on polls and needs to stop and get a grip...Smart move on Obama's staff ? ...maybe, playing it like ..He is not a savior, it requires more than just me to get this done, he will do his best to make it work, but, it all depends on how much the republicans care about getting it done for the best results for the average american,
Lots of political bs ...