Former conservative presidential candidate Evan McMullin may have lost the election but that doesn’t mean that he’s done fighting back against Donald Trump.

In a Saturday afternoon Twitter rant, the former CIA operative called out the new president-elect for the possible selection of Exxon Mobil CEO Rex Tillerson for Secretary of State.

“It must be clear that Donald Trump is not a loyal American and we should prepare for the next four years accordingly,” McMullin tweeted.

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It must be clear that Donald Trump is not a loyal American and we should prepare for the next four years accordingly. @realDonaldTrump — Evan McMullin (@Evan_McMullin) December 10, 2016

He noted that in choosing Tillerson, who has close ties to Russian President Vladimir Putin, “Trump has identified a potential secretary of state unlikely to oppose Trump’s alignment with Putin.”

In Tillerson, Trump has identified a potential secretary of state unlikely to oppose Trump's alignment with Putin. https://t.co/xc8aWzOOW6 — Evan McMullin (@Evan_McMullin) December 10, 2016

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He was also furious with Trump’s dismissiveness when addressing the involvement by Russian hackers in the 2016 presidential election. “[Trump] is purposely dismantling barriers that protect our nation from dangerous Russian subversion, which he has also welcomed,” he said.

.@realDonaldTrump is purposely dismantling barriers that protect our nation from dangerous Russian subversion, which he has also welcomed. — Evan McMullin (@Evan_McMullin) December 10, 2016

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The Hill notes that Tillerson’s relationship with Putin comes from his work at Exxon and the company’s presence in Russia.

The Trump transition team slammed the intelligence community’s assessment of the Russian involvement by saying that they were the same people that said there were weapons of mass destruction in Iraq. That isn’t entirely an accurate assessment, however. It was the intelligence community who said that there “might” be WWMDs, rather it was the Bush administration who ran with the possibility as an excuse for war. It was the intelligence community, namely Valerie Plame, who tried to set the record straight that the intelligence community was not to blame for the Bush administration’s rush to war.