You embrace someone to keep them standing. You're backing and supporting this person, so no matter what happens you've gotta keep them on their feet.

擁立 is a formal word for backing someone up for a position, usually in politics or organizations. It's used when people unite to promote or nominate someone as a leader or as a political candidate.

This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.