I’m keeping this simple:

The Electors can decide to exercise the Constitutional right to choose Clinton, based on the popular vote.

This is explained in a great new Rolling Stone article, but here’s more links for those who desire them:

The Constitution lets the electoral college choose the winner. They should choose Clinton.(Lawrence Lessig)

Stephen Colbert Asks: Is Trump Only Violating Norms or Laws?

Lawrence Lessig: Electors Are Constitutionally Permitted To Vote Their Conscience, And Should Do So – Video Transcript