John McCainJohn McCainTrump fires opening salvo in budget wars Overnight Finance: Trump budget to boost military, slash nondefense spending | Senate confirms Commerce pick | House Intel chief won't subpoena tax returns Overnight Defense: Trump proposes 3B defense budget | Defense hawks say proposal falls short | Pentagon to probe Yemen raid MORE's back-and-forth over whether he would use public financing for his campaign is bugging Jane Hamsher. She has complained to the Federal Election Commission that the Republican violated the primary spending cap he agreed to without being punished. In another post, Hamsher writes that Common Cause has the same worries, and has let McCain know about them.