The Canadian Prime Minister announced his resignation Monday, pending an internal party election to replace him

Trudeau, who is facing pressure from members of his own Liberal party to quit ahead of federal elections in Canada later this year, has been a target of frequent attacks from U.S. President-elect Donald Trump.

The "Trump factor" was a key element driving Trudeau's resignation, Chantal Da Silva said at NBC News. Incoming U.S. president Donald Trump has threatened to slap large tariffs on America's northern neighbor — and has frequently mused about making Canada America's "51st state.