From The Guardian:

A warplane on Friday bombed the Syrian town of Khan Sheikhun, where a chemical attack killed scores of people this week and prompted US missile strikes, a witness in the rebel-held area and a war monitoring group said.

The Syrian Observatory for Human Rights, a British-based organisation that monitors the war, said a Syrian government or Russian warplane hit Khan Sheikhun, in rebel-held Idlib province, before noon local time.

This is what happens when you “send a message”: people want to know just what it meant. Either the Assad government or the Russians (which you can’t 100% seperate) have decided to test whether the US is actually interested in involving themselves in the fight against Assad, or just wanted to send a very limited and ultimately ineffective message. Because the people killed in this strike are no less dead than those killed by chemical weapons.

So, again, are we just saying there is one line that can’t be crossed, and otherwise essentially stepping away from the battlefield? Or are we going to continue to degrade Assad and involve ourselves in Syria’s future? To be honest, I don’t know what is the better course. But nor does Trump.