Former coal company CEO Don Blankenship on Friday endorsed his former GOP Senate rival Patrick Morrisey while calling him a "lying" out-of-state drug lobbyist.

Blankenship, who lost the Republican primary in May, swiped at the West Virginia attorney general and GOP Senate nominee while endorsing him over incumbent Sen. Joe Manchin Joseph (Joe) ManchinSenate passes resolution reaffirming commitment to peaceful transition of power Hopes for DC, Puerto Rico statehood rise Manchin defends Supreme Court candidate Barrett: 'It's awful to bring in religion' MORE (D-W.Va.).

"I told the audience I would be voting for Patrick Morrisey because West Virginia and America must have Donald Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE and if its Morrisey that Trump wants I will vote for him," Blankenship said in a statement, referring to remarks he gave the previous night to the Tug Valley Mining Institute.

ADVERTISEMENT

"However, when I watch the video it causes me to wonder how our country got to the point that West Virginians have to choose between a lying New Jersey opiate drug lobbyist and a lying supporter of Barrack Obama," Blankenship added.

Blankenship was blocked in August by the West Virginia Supreme Court from appearing on November's ballot after losing the primary election for the GOP nomination and subsequently filing a bid to run as a third-party candidate.

The former coal CEO's attempt to launch a third-party bid worried state Republicans who feared he would siphon votes from Morrisey's campaign against Manchin, who is seen as a top target for Republicans attempting to cement control of the Senate in November.

Blankenship previously went to prison for conspiring to violate mine safety laws following a deadly explosion that killed 29 workers at a mine run by his company. He previously unsuccessfully filed to have the conviction vacated after serving a year in custody.