Right now Russia, but as soon as Trump or DeSantis gets into office in 2025, that will change.
Biden is sending hundreds of troops to Somalia. How many wars did Trump start?
Trump massively increased the drone strike program and loosened the rules of engagement in Syria and Iraq, in addition to increasing the frequency of boots-on-the-ground missions in Yemen. Formally, he started no wars, but he did increase bloodshed - although there’s a case to be made that his continued presidency would have prevented war in Ukraine.
Biden has sold out his voters on almost everything, but he’s the least pro-blob US president of the 21st century. As with Trump, his administration is partially co-opted by it, but he’s been a fair bit better at telling it where to get off (see: Afghanistan). Whatever Trump says on the matter is basically immaterial because he has proven to be easily manipulated by neocons when it matters, to the extent that he almost started a war with Iran.