Former Arkansas Gov. Mike Huckabee targeted both Rep. Maxine Waters (D-Calif.) and North Korean leader Kim Jong Un in a tweet on Thursday.

"@POTUS has dispatched Maxine Waters to NOKO [North Korea] to talk to Lil Kim. After 1/2 hour with her he will drink whatever he gave to his 1/2 brother," Huckabee tweeted.

@POTUS has dispatched Maxine Waters to NOKO to talk to Lil Kim. After 1/2 hour with her he will drink whatever he gave to his 1/2 brother. — Gov. Mike Huckabee (@GovMikeHuckabee) August 10, 2017

He appeared to be referring to the poisoning of the North Korean leader's half-brother Kim Jong Nam. South Korea's spy agency said in February it believes Kim Jong Un ordered the killing.

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The comments come amid escalating rhetoric between Pyongyang and Washington.

Trump said Tuesday that continued North Korean threats would be met with "fire and fury."

North Korea in turn threatened to strike the U.S. territory of Guam.

Waters is a frequent critic of the administration, and she earlier this week said Trump is the worst president in her lifetime.

"The worst I've ever seen, the worst I've ever experienced, yes I do," she said.