William Cummings

USA TODAY

The decision to launch airstrikes against the regime of Syrian leader Bashar Assad represents an 180-degree change for President Trump. Less than four years ago, Trump was strongly opposed to intervention in Syria over Assad's use of chemical weapons.

Don't believe it? Let's go to the tweets.

Trump was concerned about the possibility of civilian casualties: ​

He also had doubts about then-President Obama's ability to conduct a war:

And he insisted Obama should seek congressional approval before acting:

Plus, Obama had already talked the whole thing to death:

Which maybe wasn't a bad thing:

Because the focus should be on making America great again:

So, just in case there were any doubts:

Read more:

U.S. launches cruise missile strike on Syria after chemical weapons attack

Analysis: How will Syria respond to U.S. missile strike?

Syria's civil war: A look at how we got to this point

Trump: Syrian strike is in 'vital national security interest' of United States