She is dumping all sorts of unconstitutional things onto her platform.
Trump will have much more to discuss in the coming months than just her right to the nomination.
This particular point is an attempt to make some democrats feel disenfranchised by having voted in a betrayal of trust during the primary.
Dems want to win. Most know Biden had a snowballs chance in hell. Trump’s people have to be writing the ad scripts, gathering the vids and film, and planning when and where to unleash them. Meanwhile Trumpp should pick one Harris proposal and one Biden failure a day and make those his talking points.