witness katy perry... aaaaaaw look at that dog! katy perry: with music videos and behind the scenes footage, xfinity lets you witness all things me. tonight, tensions between president trump and senator john mccain escalating as mccain spoke, again, about bone spurs. the condition which trump cited as the reason for one of his five draft deferments for the vietnam war. hopes to sell his tax plan to the very senate republicans he thrives on attacking. tom foreman is "outfront." >> reporter: from screaming phone calls in private, to bitter putdowns in public. president trump continues feuding as much with his own party as he does with democrats. >> we're not getting the job done. and i'm not going to blame myself. i'll be honest. they are not getting the job