The only way to change the Constitution is by amendment or convention. A congressional amendment is simply impossible. It would require states such as Alaska to vote against their interests, to give up their huge representational advantage in the Electoral College. It could also be done by convention. But with the lunacy prevalent that elected Trump, it would be incredibly dangerous to hold one, since it would have an open agenda. Who knows? Camps for Muslims? Death penalty for abortionists? Repeal of the 1st, 4th, 5th and 14th Amendments?