I don't think anyone is suggesting pulling out of intelligence sharing with the US entirely.

But maybe CSIS will want to pick and choose a little more carefully which pieces of information get shared (realistically, I doubt any of the Five Eyes are sharing 100% with their allies anyway). But if POTUS is going to share details with Russia that are apparently too secret to share with the rest of the Five Eyes (and we have to be realistic, he may very well be a traitor in league with the Russians), the rest of us probably shouldn't share anything with the US that we wouldn't want the Putin regime informed of.