COVID-19

During the COVID-19 pandemic in Michigan, Maddock promoted misinformation about the virus.^[7] In October 2020, Maddock falsely claimed on Facebook that COVID-19 was less lethal than the flu.^[7] Matt Maddock routinely did not wear a face mask at the Capitol building; his wife, Michigan Republican Party co-chair Meshawn Maddock, made inaccurate claims on social media that the use of face coverings was "ineffective" and "harmful" and suggested that employers be sued over the matter.^[8]

In November 2020, Maddock introduced a resolution to impeach Democratic Governor Gretchen Whitmer over her COVID-19 shutdown orders; the resolution, introduced during a lame-duck session, did not gain the support of the Republican legislative leadership though the Michigan Supreme Court did rule the shutdown orders illegal a month later.^{[9][10][11][12][13]}

In April 2021, Matt Maddock was one of a handful of Republican state representatives to appear at a protest opposing COVID-19 vaccine passports.^[14]

Efforts to overturn 2020 presidential election results

Maddock had promoted the false claim that the 2020 presidential election, in which Donald Trump was defeated by Joe Biden, was marred by election fraud. In November 2020, Maddock and other Trump supporters protested at the TCF Center at Detroit to challenge the counting of votes because they felt the legal process was not being followed.^[15] Maddock falsely claimed that 35,000 ballots "showed up out of nowhere" and that Democrats "were pretty much cheating in front of poll watchers."^[16]

In December 2020, Maddock and Daire Rendon joined a federal lawsuit filed by Trump supporters to challenge the election results. The suit asked for state lawmakers to certify the election results, therefore letting the Republican-led Michigan Legislature to overturn Biden's victory in the state. The judge dismissed the suit, writing that their arguments were "flat-out wrong" and "a fundamental and obvious misreading of the Constitution."^[17]

In January 2021, ahead of the counting of the electoral votes and the U.S. Capitol attack, Maddock and 11 other Michigan Republican state legislators wrote a letter to Vice President Mike Pence, urging him to refuse to count electoral votes from states won by Biden until a voter fraud investigation could take place. Responding to such calls, Pence replied in a letter to Congress, "It is my considered judgment that my oath to support and defend the Constitution constrains me from claiming unilateral authority to determine which electoral votes should be counted and which should not."^[18]

Both Maddock and his wife, Meshawn Maddock, co-chair of the Michigan Republican Party^[19] and a member of the national advisory board of Women for Trump, were present at the January 5, 2021 rallies. A video and photo of the couple speaking at that rally is no longer available on her Instagram account. Meshawn claimed she had organized 19 buses of people to attend the event.^[20] Meshawn also texted, "As a leader for Republicans in Michigan, I'm going to stand shoulder to shoulder with Americans that know voter fraud is real. Voters no longer trust the system and we want people prosecuted. Now is not the time for summer soldiers and sunshine Patriots, now is the time for brave men to do the right thing. We never stop fighting."^[19]

When the Maddocks walked to the Trump rally at The Ellipse on January 6, they said they couldn't get in and went back to their hotel. After the violent attack on the Capitol, Meshawn Maddock said that the rally was intended to be a "peaceful event"; that the people who "became a mob and broke the law should be held accountable"; and that she was "horrified by the death of the young woman and pray for the healing of our nation."^[21][22][23]

Maddock was endorsed by Donald Trump on November 11, 2021.^[24]

Prediction of political violence

Maddock's wife, Meshawn, was among sixteen Michigan Republicans who were indicted in July 2023 for alleged conspiracy in a fake electors scheme to overturn the 2020 Michigan presidential election results. At an August 2023 legal defense fundraiser at his home, Maddock told attendees that "if the government continues to weaponize these departments against conservatives" that someone would be shot "or we're going have a civil war or some sort of revolution."^[25]

Claims of illegal immigration

On March 27, 2024, Maddock promoted the conspiracy theory that the governor of Michigan Gretchen Whitmer had invited a group of undocumented noncitizens to move to the city of Detroit^[26] in a post on X, formerly known as Twitter. In his posts, Maddock stated that three buses at Detroit Metro Airport were loaded up with "illegal invaders", and he was inquiring as to their destination.^[27] In fact, the buses were chartered to transport the Gonzaga University men's basketball team to compete in an NCAA Sweet 16 tournament game against the Purdue Boilermakers at Little Caesars Arena in Detroit.^[28][29]