Will Trump turn to Ukraine next? He bombed some boats in the Caribbean. He deposed Nicolas Maduro. (He mostly left the region, and it's not totally clear what's been solved.) Something similar happened in Iran: He assassinated some nuclear scientists, targeted some nuclear sites, and deposed Supreme Leader Ali Khamenei. (The enriched-uranium stockpile appears to at least partially remain, and, again, it's not totally clear what's been solved.)
Never one to stick around and actually really get to the bottom of a foreign-policy situation, President Donald Trump may now be setting his sights on Russia's war in Ukraine.