Alan Abramowitz: “Republicans made major gains in the 2014 Senate elections but the findings reported here indicate that outside spending by conservative groups had little or nothing to do with those gains. The main reason why Republicans did very well in 2014 was that Democrats were defending far more seats than Republicans and many of those seats were in states that normally favor Republicans based on recent presidential voting patterns. Democrats lost all seven of their seats in states carried by Mitt Romney in 2012 even though Democratic candidates enjoyed an advantage in outside spending in several of those races.”

