Trump could have pulled America out of this war against Russia.Trump's braggadocio has always been a serious character flaw. What I -liked- about Trump was his reluctance to escalate things with Russia, something Biden seemed less averse to. Trump still appears to be holding on this reluctance, to his credit. Also to the Trump Administrations credit, they have stated that Israel's bombing of Iran's was done of its own accord. As to how things progress from here, that I don't know.
He did not do that.