In general, yes. Earlier this year, the Supreme Court ruled that states can punish and replace "faithless electors" who cast votes that differ from their state's popular vote.

Yes they can — and have, multiple times — because of the Electoral College. President Trump lost the popular vote in 2016, for instance.

Inauguration Day is Wednesday, Jan. 20.

Are electors bound to vote for their state's winner?

Can a popular vote winner lose the presidential election?

When will the next president be sworn in?