Instead, he should wrap the Biden record around her neck and force her to defend her dismal performance (inflation, open border, loss of energy independence, etc.). Her selection of Walz was a gift to Trump, and Vance is exploiting that effectively.
Many years ago, the GOP nominee for governor of Texas (Clayton Williams) had the election in the bag against the female Democrat nominee. For some reason, down the stretch he elected to hurl vile insults at her, refused to shake her hand and in the process stirred up the animosity of quite a few independent female voters. In the end, he lost a very winnable race to Ann Richards. I'd hate to see history repeat itself this time by Trump mimicking the same behavior.
A descriptor isn't an insult.