Trump is having his weakness exploited ...He did not know US backed or did the bombing in Russia nor the chem attacks. Syria did not have chems the rebels did... Then he was shown pictures of children suffering and was presented with options...He acted
No presidents personally are convinced of these or other issues. Always trusted or competent people do it. Therefore, if the intelligence reported and checked this information, then he had to react. But how else would it have happened otherwise?