Come on. Obama's continuation of presidential power-creep is not what enables Trump. Trump getting elected, taking over the Supreme Court, getting elected again, having all the billionaires lick his ass, etc is what enables him.
If you wanna lay it on Obama, blame him for not taking the right wing seriously enough and going after them at the local level where they had been building strength for the past 50+ years. Or for not betraying all his moderate-conservative supporters to implement some seriously progressive policy.