Voters are shifting over to Democrats from Republicans.

http://www.washingtonpost.com/politics/lost-ground-for-gop-signals-challenges-for-2016/2015/07/04/0b6703d6-226e-11e5-aeb9-a411a84c9d55_story.html

The Gallup organization reported its latest findings on party identification late last week, and the report contained good news for the Democrats and a flashing yellow for Republicans.

The Democrats “have regained an advantage” over the GOP in party affiliation, Gallup’s Jeffrey M. Jones wrote in an accompanying analysis. Republicans, he added, “have seemingly lost the momentum they had going into last fall’s elections.”