He is,at least,rational.
And Tucker probably did more harm than good to Trump with that interview, he let Putin off the hook about his ties to Iran, the "special operation" in Ukraine, and the laughable claim about their economy.
NOTE: I am against our backing Ukraine, IMHO both sides are run by kleptocracies, and Putin rightly thinks the West will eventually get tired an let him have Ukraine, since we didn't do anything when he took the Crimea.