After the horrific Syrian chemical attack that killed dozens of men, women and children, it appears the Trump administration is forming an international coalition to pressure Syrian President Bashar al-Assad from power.

The Assad government - which is supported by Russia and Iran - is believed to be behind the attack, which came amid the civil war and subsequent refugee crisis that have devastated Syria.

Mark Steyn said on "Your World" today that President Trump should be cautious about using American power to overthrow a dictator without a very clear endgame.

"To go back to the Democrats' most notorious debacle, Hillary [Clinton] thought knocking off [Libyan President Muammar] Gaddafi in Libya would be easy and cost-free," Steyn said.

He said it was anything but, however, as it left a power vacuum and further destabilized the Middle East.

"You've got to have an endgame here. You've got to know what you want Syria to look like after Assad, or it's a waste of time," Steyn said. "Trump has been very clear that he regards running around Afghanistan for 15 years as a complete waste of time. He doesn't want to get into a similar situation."

Watch more above.

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