There’s no way to ‘rig’ Iowa caucuses short of brazen altering of vote results. If candidate’s supporters show up, those with the most win. Period.
Looks like the desantis’ already did try to cheat in the caucuses
Casey DeSantis Just Urged Out-of-Staters to Illegally Caucus in Iowa
What ID is Casey DeSantis going to provide when she tries to vote in Kossuth County Iowa GOP caucuses?