(SOUNDBITE OF ARCHIVED RECORDING)

PRESIDENT DONALD TRUMP: It crossed a lot of lines for me. When you kill innocent children, innocent babies – babies – little babies with a chemical gas that is so lethal that people were shocked to hear what gas it was, that crosses many, many lines beyond a red line – many, many lines.

LIASSON: He said this heinous act cannot be tolerated and that his attitude towards Syria and Assad had changed very much. So it‘s possible this means he‘s changing his mind from what had been a very consistent position on Syria, which was that it wasn‘t our fight.