Keeping it a single state means fewer senators. Not that Canada is like a communist haven or anything, but they're FAR from our MAGA bullshit and they don't wanna dilute the power they've accumulated in that chamber of congress.
Also, Canada would be the 3rd or 4th highest GDP in the US if it became a single state. California and Texas have it solidly beat. NY is neck and neck with Canada.
Yeah whining about the exact words she used while ignoring the substance of the memo is exactly the useless purity test that fucks up want attempt at getting real left politics in government.