As Liberal party leader, it's Mark Carney, a former central banker and economic policy guru.
As Prime Minister, it remains to be seen. In theory, Carney could take over from where Trudeau left off before Parliament was prorogued. In reality, the opposition parties have already promised to topple the government and trigger an early election.
Our election cycle is much shorter than the USA's, so even if there's an election called tomorrow we'll have a new government and PM by the summer.
I'll also always remember how the Liberals pulled a judo-reverse on the Conservatives by turning their main line of attack back against them. I knew from the moment I saw that ad with Trudeau on the escalator that the Liberals would win.