Latest Gallup 23% Republican, 28% Democrat, 46% Independent.
Counting "leaners" 41% Republican; 47% Democrat.
On the democrat side, they show Warren and Biden, neither of whom have announced.
Real Clear Politics aggregation of polls shows the Republican leader Trump, polling the WORST of all GOP hopefuls, versus the democrat favorite Clinton.
I'm prepared to predict the GOP will lose the White House in 2016 and quite possibly the Senate.