It's not and never was up to the politicians. Unaccountable politicians is why we are where we are. It's up to the American people.
The American people are the only ones to make the politicians feel the heat. The American people are the only ones who can tell Congress, as Reagan said, "if you don't see the light, we'll make you feel the heat" with the unfeigned threat of THROWING THE BUMS OUT for not preserving, protecting, and defending the Constitution.
It's up to the American people to pressure Congress into impeaching this renegade, dangerous President.
There is one way impeachment is possible -- if Democrats suffer a big enough loss in November and enough are willing to ditch Obama to save their party.