POTUS needed to cover his downside by bombing Syria. A red line was crossed, and he doesn't want to look like Hussein. It also helps to pacify the war hawks by taking military action without committing troops to Syria. The bombing is also a message to North Korea. If you cross the nuclear red line, POTUS will respond with great power and precision.

POTUS doesn't want war with Syria. He wants to get out of Syria.

Trust the plan and trust POTUS.