It means they're looking for incriminating information without any evidence it exists. They're "casting a wide net," to use another fishing term, in hopes of finding something illegal, even if there's no basis for them asking the questions in the first place.

Basically, if a single signature is found to be an error, DeSantis will claim it's all fraud and sue and blah blah blah vs. a normal person saying just remove the one signature.

Asking questions is how you become educated. Respect.