^^^
Trump went on the Clay Travis radio show and called Putin's invasion "genius," "wonderful," and a "peacekeeper." He says we need that on the southern border.
He was asked, very specifically, what he would do differently. He gave no answer. Of course, there will be some manufactured answer in a couple months from the right about how foreign policy is very predictable and Trump would have used the benefit of hindsight to do the optically correct decision in every scenario (this is what happened in Afghanistan).
He also said that Biden did nothing in response to Putin's speech, which is just not true. Biden just sanctioned Russia. Russia's economy is tanking right now. Trump, by the way, didn't sanction Russia once during his term.