Actually they can. Obama's sanctions after they invaded and occupied Crimea, which by the way they still do, was costing them $270 Billion a year, crushing their economy.
We didn't hear any stories about crushing sanctions during the Trump years, did we?
And I notice there were ever any demands from Trump to end the occupation of Crimea either, did we?
And FYI, Russia isn't a trade leader in anything. They make nothing, and import little. They are an autocratic oligarchy, that operates a giant gas station.
In the Siberian Arctic, lies a trillion dollars worth of oil. Exxon-Mobil wants to help them get it out, because they don't have the means to. Obama stopped that, and Putin is still pissed about it. So is Exxon-Mobil.
Biden should send a very clear message to both of them. It ain't happening. And if you invade Ukraine with those troops massed on the border, the sanctions Obama put in place are going to be doubled with no let up for the next three years at least, and a whole lot of ballistic missile operations are going to find their way into Europe in a very short period of time.
Russia ain't shit, and unless they want to go full end the ******* world nuclear exchange, there isn't a damn thing they can do about it.