Donald Trump launched a campaign on Truth Social, posting over 160 messages alleging that Joe Biden's use of an autopen device invalidates many documents signed during his administration.Trump declared roughly 92% of Biden's documents, including pardons and executive orders, are null due to autopen use, further alleging that Michelle Obama, Jeff Zients, and Hunter Biden were involved in a scheme to control presidential pardons.Legal experts and Biden's administration have rejected Trump's claims, referencing a 2005 Department of Justice memo and affirming the legitimacy of autopen signatures, while the Republican-led House Oversight Committee called for investigations into executive actions and misuse of authority.