According to a January 8 report by CNN, Isenstadt writes that Bartiromo was a “Trump favorite” for her fervent defenses and softball interviews of the president-elect. As per Isenstadt, Trump “was dead serious about Bartiromo and was making the case for her" to be his running mate, but ultimately there “was no time to vet Bartiromo, as they had spent months doing with other candidates."

Bartiromo repeatedly used her Fox show to fan the conspiratorial flames during the 2020 election and its aftermath. When she interviewed Sidney Powell about “voting irregularities” in November 2020, Bartiromo was aware that the Trump lawyer would “respond with conspiracy theories about Dominion” based on sources that Powell admitted herself were “pretty wackadoodle” — yet Bartiromo still gave credibility to Powell’s “far-fetched claims.” The lawsuit filings revealed that Fox News knew about Bartiromo’s conspiratorial coverage but did little to stop it, with executives privately lamenting that Bartiromo amplified “GOP conspiracy theorists.” Bartiromo also used the right-wing social media app Parler to push a slew of election conspiracy theories.

Bartiromo was instrumental in advancing 2020 election conspiracy theories that led to the January 6 insurrection, particularly the claims that Dominion and Smartmatic voting machines flipped votes. The companies sued Fox News and other conservative media outlets for spreading these bogus conspiracy theories, and Fox ultimately settled with Dominion for $787 million. Bartiromo was repeatedly named throughout the various lawsuits, and it was later revealed that she took directives from the Trump campaign to promote the plan to overturn the 2020 presidential election results.

Bartiromo’s election conspiracy theories continued into the 2024 election. In several segments, for example, Bartiromo elevated an extremely flimsy claim that undocumented immigrants were obtaining drivers licenses to vote — based on the wife of a friend of a friend alleging that they saw “a massive line of immigrants” outside of a Texas Department of Motor Vehicles office, which Bartiromo interpreted to mean “illegals.” A spokesperson for the Texas Department of Public Safety noted that assuming that nonwhite Texans are undocumented is “kind of racist” and called her story “simply false.” 

In 2023, Bartiromo pushed a story on her show more than 200 times from an FBI informant who claimed that President Joe Biden and his son Hunter took bribes from a Ukrainian oligarch. The informant, Alexander Smirnov, was ultimately indicted for lying to the bureau and allegedly fabricated his accusations — news which Bartiromo later attempted to downplay, after using her Fox show to promote Smirnov’s debunked claims as “the most serious charges ever leveled at a President.”