Tony Abbott wasn’t supposed to be in the running. While it was obvious that Malcolm Turnbull wasn’t going to last as leader of the Liberal Party, his competitor for the role was Joe Hockey. Abbott only threw his hat into the ring at all because the conservative wing of the party didn’t like either Hockey or Turnbull.
But on the first round of voting, he won more votes than either of the other two. Hockey was eliminated, and in the second round of voting, Abbott narrowly defeated Turnbull. He would go on to become Prime Minister in 2013, and in due course, be knifed by his own party and replaced with a new leader, some guy named Malcolm Turnbull.
Julie Bishop’s tenure as Deputy Leader continued under the new leader.