Nobody cares about her as a campaign issue.
Trump is known for being a petty asshole and that is why the kind of people who vote for him like him.
The kind of voters who Biden is trying to appeal to, would be turned off if he wasted his time by promising to investigate Ivanka "Who-Gives-A-Shit?" Trump.
You are basically lowering our side to the level of their side.
Yes, I did and do favor Biden standing up to Trump, but not like that. What I meant was not allowing Trump's lies to go unchallenged and to respond to any Burisma allegations and innuendo, with allegations and innuendo of Russian influence.
Dragging his empty headed, dipshit daughter into it and promising to sic the Feds on her would be a guaranteed losing strategy.
But then again, maybe that's been your goal all along, eh?