Jim Geraghty of National Review and Greg Corombos of Radio America welcome a new poll showing Missouri Democratic Sen. Claire McCaskill losing to her likely Republican opponent.  They also shake their heads as more than 30 House Republicans, including several committee chairmen, are retiring and leaving it much tougher for the GOP to hold the majority after the midterm elections.  And they react to Life Time gyms refusing to turn their televisions to cable news channels because they conflict with the gym's commitment to a "healthy way of life."