Trump's eligibility for the presidential ballot is being challenged in over 30 states, with a variety of strategies being employed. John Anthony Castro, a Republican candidate, has filed lawsuits in 27 states to remove Trump from the ballot, but none have succeeded. The challenges are based on the 14th Amendment, which bars officials who engaged in insurrection from holding office. The issue has sparked a diffuse process involving various individuals and groups, with some questioning the unconventional nature of the challenges. Despite the lawsuits, Trump continues to lead in polls for the Republican primary. The ultimate decision on his eligibility may rest with the U.S. Supreme Court.