expression, godan verb (-ru)
side with the winner; ride coattails; jump on the bandwagon
Idiomatic expression meaning to align oneself with the winning side or a successful person for one's own benefit. Often carries a slightly opportunistic or shrewd connotation.
彼はいつも勝ち馬に乗るのが上手い。
He's always good at siding with the winner.
選
There are people who try to jump on the bandwagon every election.