Another opposition lawmaker defects to Canada's governing Liberals

The defection of another opposition lawmaker is all but assuring Canadian Prime Minister Mark Carney will have a majority government soon. Opposition New Democratic interim leader Don Davies says he is very disappointed fellow party member Lori ldlout has decided to join the Liberals. That puts the Liberals closer to having a majority government and being able to pass any bill without opposition party support. Carney has called special elections for three districts that would give the Liberals a majority government if his party wins two of them. Two of the seats are considered to be safe for the Liberals.

AP News
@keyofG
Liberals 2 members from a majority in Parliament after NDP member crosses the floor.
It seems random, perhaps even natural. MPs have switched sides often enough in the past that it’s not unheard of .
But what is really motivating these defectors?