it's called forcing a leadership review...
rumours are abounding that the liberal wing of the new Conservative Party in Canada is planning a mutiny on Harper if he loses the next election......
oops what I meant is they are already planning a mutiny, there is always a leadership review when you lose
you see in parliamentary democracies you don't vote for the leader you vote for the local candidate in your riding, the party with the majority of the seats in Parliament gets that leader as their PM
of course Americans elect the President directly so you can't get rid of him except by impeachment......