What happens when no candidate gets to 270 and the House has changed parties?

[True Federalist (진정한 연방 주의자)]

The new House votes, but keep in mind that each state delegation gets one vote.

So in 2017, even if Democrats win a narrow House majority, there is a good chance that the GOP will still control a majority of state delegations.

Or that no one controls a majority of 26 delegations.  Tied delegations don't vote so they effectively count as a vote against all the presidential nominees under consideration.  If the Senate also splits 50-50, we may end up with no President-elect or Vice President-elect come the 20th, in which case the Speaker of the House becomes Acting President (if eligible).

[True Federalist (진정한 연방 주의자)]

No, the rule given in the 12th amendment is that a majority of the whole number of Senators is needed, so that's 51 Senators since we have 100 Senators. Even if a Senator isn't there for the vote so that there is a 50-49 majority in the vote that's not sufficient.

You must be logged in to read this quote.

The Vice President has no role in selecting his successor beyond voting in November.

(There's also the awkward possibility of 34 Republican or Democratic Senators refusing to show up so that there is no Quorum, but I don't think we've reached that level of incivility just yet.)