Rep. Duncan Hunter (R-Calif.) on Tuesday said President Obama could be impeached if he goes ahead with a military strike on Syria if Congress doesn’t approve his war resolution.

{mosads}“I think he’s breaking the law if he strikes without congressional approval,” Hunter told The Washington Times. “And if he proceeds without Congress providing that authority, it should be considered an impeachable offense.”

Hunter visited the border between Syria and Jordan last week and said he’s leaning against military intervention. He served in the Marines in Iraq and Afghanistan and now has the rank of major in the Marine Reserves.

The three-term congressman also warned Tuesday that if Congress authorizes the Obama administration’s plan, the strike needs to go full throttle.

“We need to go all in, 100 percent, hell-bent on setting them back a decade when it comes to their weapons capability,” Hunter said. “There can be no half-measures.”

Sen. John McCain (R-Ariz.) made similar comments Tuesday on “The Today Show.”

“I’m already talking to a lot of my colleagues, but before I persuade them to support this, I have to be persuaded,” he said, adding “a weak response is almost as bad as nothing.”

McCain met with Sen. Lindsey Graham (R-S.C.) and President Obama in the Oval Office Monday. McCain said afterward that if Congress rejects the resolution, the consequences would be “catastrophic.”

As far as Hunter’s impeachment threat, Rep. Walter Jones (R-N.C.) issued a similar warning in June. He said Obama could be impeached if troops were sent into Syria and are killed.

The White House has repeatedly said there would be no boots on the ground. But, it has not made clear what it would do if it doesn’t have congressional support for a strike.

Former President Bill Clinton was the last commander in chief to be impeached.