On Tuesday, he was one of two Republicans on the four-person Wayne County bipartisan canvassing board to temporarily block certification of votes based on dubious claims of voting irregularities in Detroit.
The initial vote against certification drew the attention of the President, who posted a series of tweets praising the GOP members of the canvassing board for “having courage.”
After a few hours, however, Hartmann and his Republican colleague voted along with the board’s two Democrats to certify the votes.
On November 7, the day major news outlets projected Joe Biden President-elect, Hartmann posted on Facebook, “I’m reading the news on how great things are now that Biden and Harris are in as declared by the MSM. What will happen if it doesn’t happen once the official results are tallied? I wouldn’t sell the farm yet.”
On November 9, Hartmann furthered a conspiracy theory pushed by some Trump supporters that suggested the timing of the announcement of a Covid-19 vaccine was politically motivated: “As predicted: Not even a week after the election and they’ve now got a covid vaccine that’s 90% effective.”
CNN has reached out to Hartmann for comment through social media, email and through phone numbers listed as being associated with him.
In October, he shared a link to an OAN video that pushed a widely debunked conspiracy theory that claims hospitals are inflating the Covid-19 death-toll by falsely reporting deaths from the virus.
“Eye Opener. Do the math. How much were Hospitals overpaid by falsely reporting?” Hartmann wrote.
That post was labeled as false by Facebook’s fact-checkers.
Hartmann has shared multiple videos from OAN on Facebook over the past few weeks. OAN is a conservative cable network that the President has been promoting heavily in recent days as it continues to share misinformation undermining the integrity of the election.
When Obama was in office, Hartmann’s shared a series of racist posts about the President on Facebook that were still online on Wednesday.
The images in the posts equated Obama to a criminal and an Islamic terrorist.
Facebook removed one of the posts — which equated Obama to an Islamic terrorist — after the company was contacted by CNN on Wednesday. Facebook spokesperson Andy Stone said the post was removed under Facebook’s hate speech policies. The company did not immediately provide comment about the other posts.
CNN’s Mi Seon Lee contributed to this story.