Rep. Tulsi Gabbard has long been an independent-minded Democrat, having fiercely criticized President Barack Obama for not using the term “radical Islam” to properly identify Islamic State militants, but she may have gone too far in her stance on Syria.

A combat veteran who served two tours of duty in Iraq, Gabbard is drawing the ire of Howard Dean for being “skeptical” of whether Syrian President Bashar al-Assad was behind the recent chemical attacks in his country.

So much so that Dean took to Twitter to say the Hawaii lawmaker needs to resign.

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This is a disgrace. Gabbard should not be in Congress. https://t.co/yDTh43GZam — Howard Dean (@GovHowardDean) April 9, 2017

“I think it’s outrageous,” Dean said Sunday on MSNBC, in reference to her remarks.

“There’s a long well-known history, both in our intelligence community, Amnesty International and Doctors Without Borders,” he continued. “Every single one of these agencies has said that Assad is using chemical weapons. He’s a barbarian, he’s murdered half a million of his own people.”

Dean could not fathom what Gabbard was thinking.

“I can’t imagine how you could make a statement like that, especially being on the Foreign Relations Committee,” he said. “I can’t imagine what could possibly be going through her head.”

MSNBC host Alex Witt countered that “all she’s asking for is proof.”

“If you’re on the Foreign Relations Committee and you haven’t seen the proof in the last five and a half years, there’s something the matter with you,” Dean snapped. “I am tired of people making excuses. This is no different than Trump making excuses for Putin. We’ve had enough of this.”

“Let’s talk about facts and the fact is, Assad is a butcher, a murderer, and he has repeatedly over the past few years used chemical weapons on his own people! What more do you want?”

Wow, Dean siding with Trump… who would have thought the day would ever come?

But then, in his own words: “I believe in country over party.”

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I'm not blasting a Dem for disagreeing. I'm blasting for raising doubts about Assad's chemical massacre. I believe in country over party. https://t.co/UVbVm4Zq5c — Howard Dean (@GovHowardDean) April 9, 2017

Toto, I’ve a feeling we’re not in Kansas anymore.