Backing, Support
noun, verbal noun
Stand behind someone and embrace them. That's how you show them you're backing and supporting them. Do this to your local politicians.
ようりつ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
どうせ出馬者を擁立しようとしているだけだろう。
I’m sure that they are just trying to support the candidate.