It's simple: because they have no platform.
They have nothing to offer.
They haven't changed since the last election (got even worse).
They keep leaning toward the right,instead of the left.
They still pro war,pro Wall Street.
They still rig their own elections,kicking progressives out of the race. (no,it wasn't Russia,it was the Democrats)
They still represent only their corporate donors,instead of the people.
They still whining about Clinton's enormous loss and blame it on everything and anything under the sun,instead of looking in the mirror.
Because their only (!) slogan is "we have to hate Trump".
Newsflash morons!It won't work.Your Party is dead.