He just sends Winsome Losesome out there to do his dirty work for him.
Unfortunately, this is likely true. No one is going to attack a Black, immigrant, woman. Not even Trump and they know it so he counter attacks Youngkin instead and Youngkin can claim plausible deniability and look like he is above it all. Sears threw the first punch and was quite nasty. She sounded just like Liz Cheney. That said, it might work better for Trump to say how disappointed he is with Sears and thought she was a better person than that. It would sound a lot better.
You do know Lt Govs do not run on the same ticket and often states elect Lt Govs not even the same party as the gov. She speaks independently.