Vladimir Putin
It could have far-reaching consequences for Nato and the Ukraine war.
But Pat McFadden says the Russian president "will not be successful".
Russia has previously failed to "gain air superiority over Ukraine".
Lib Dem deputy leader Daisy Cooper said allies have been to slow to act over the war.
The Russian president said he was prepared to "respond resolutely in a mirror way".
The MoD claims the intense losses Moscow has faced have "drastically undermined" its armed forces.
It comes hours after Ukraine said Russia had used a missile which can carry nuclear payloads for the first time in the war.
Ukraine claims Putin may have used the deadly weapons for the first time.
And the West needs "to get to Trump quickly," according to a former national security adviser.
PM Keir Starmer has previously refused to divulge any "operational details" around the weapons' usage.