putin. but it really comes down to him, and he is showing no signs of wanting an offramp. this talk of no-fly zones and humanitarian corridors, unless he orders his troops to abide by that, it's not going to happen. arthel: and what's your reporting on the notion of banning russian oil imports? >> reporter: well, it's important to remember that the u.s. imto rts an average of 209,000 gallons per day of crude oil, 500,000 barrels per day of other petroleum products. that's 3% of u.s. crude oil imports. by contrast, the u.s. imports 61% from canada, 10% of its oil from mexico and 6% from saudi arabia. the one place they're looking to perhaps get more oil to replace russian crude oil would be venezuela. remember that in 2019 the trump administration imposed sanctions on venezuela, and that cut off u.s. supplies of venezuelan oil.