President Barack Obama resisted sustained and unmitigated pressure to attack Syria, but regretfully succumbed to do his thankfully partial bit, as he amazingly admitted. (See my Guardian article from last year).
https://www.theguardian.com/commentisfree/2014/sep/23/war-barack-obama-isis
President Trump, his poll numbers falling drastically with one clueless stumble after another, is looking for ways to recover. His suddenly aggressive new stance on Syria is designed to build some sorely-needed mainstream support, and he has zoned in on one of the easiest ways to do so – to get into bed with the powerful anti-Iran, pro-war, pro-Israel lobbies.
His presumed plan is a recipe for another Mid-East propelled global disaster, that he himself warned against throughout the campaign. This was among the few positive, redeeming features of his proposed candidacy.