She wants to be PM. She thinks she can do better vs. Poilievre, and she might be right. With the hated Justin out of the way, it will be a much more competitive election.
Wanting doesn’t mean getting. The Liberals might save a few seats by changing leaders, but they are already a minority Government that just lost its fourth by-election in a year.
Unless Pierre Poilievre is found in bed with a live boy or a dead girl, he will be the King’s first minister for Canada by the end of October, if not much earlier.