Disturbing if we were in a normal political situation.. but we're in a situation of brinkmanship where one party is trying to take over as the unstoppable uniparty despite having a clear minority and resorting to cheating.. and the other party's facade of 'major' players are clearly trying to play along.. while the rest of the party's players and majority of voters attempt to pick up the pieces and fix the mess that was created by this situation. In the politics of brinkmanship, Yellen's letter might as well be a teeny tiny little warning.