Ian Bremmer's Quick Take: Hi, everybody. Ian Bremmer here, and kicking off the week with more concerns about rising tensions between the United States, NATO, and Russia over Ukraine.

We saw from the Biden press conference last week, which feels already like a month ago, that he believes the Russians are "going in." That doesn't mean full invasion and overthrow of the Ukrainian government, which would impose massive costs on the Russians. But some form of direct Russian escalation that the United States would respond sharply to and wants to convince its NATO allies that they need to as well.