The 538 members of the electoral college will gather at state capitols across the country this afternoon to cast their ballots for President. The usually symbolic ceremonies, full of pomp and circumstance, have drawn intense attention this year. There has been much effort made to dissuade the electors from voting for Trump.
To be effective, 37 of 306 Republican electors would need to vote for someone, anyone else. Only one Republican has announced that he will be faithless and more have suggested it, but not nearly in the numbers needed to not elect Trump.
Regardless, if Trump does not get 270 electoral votes today, the decision then goes to the House of Representatives to choose the president. The House will choose Trump.