In late 2020, Texas, led by AG Ken Paxton, sued
Georgia, Michigan, Pennsylvania, and Wisconsin, alleging they unlawfully changed election laws due to COVID-19, which Texas claimed facilitated voter fraud and skewed results, seeking to overturn their electoral votes, though the Supreme Court rejected the suit for lacking standing. Six other states—Missouri, Arkansas, Louisiana, Mississippi, South Carolina, and Utah—joined Texas's suit, supporting claims that the defendant states ignored federal and state laws
It looks like a state can cheat, and all the other ones can't do anything about it.