Dan Pfeiffer has some thoughts about how they plan to attack Harris if she does become the nominee: Despite their hatred of the “Crooked Media” (and Crooked Media), the Republicans follow the news. They know what is happening on our side. They built their entire campaign around beating Joe Biden — using concerns about his age as a proxy to frame the race as strong vs. weak. Thanks to Biden’s debate performance, that strategy worked well. As we stand today, Trump is a heavy favorite to return to the White House. The campaign wasn’t set up to beat Kamala Harris or someone else, so Trump supporters are begging Biden to stay in the race. As the convention continues, more and more Republicans are trying to shoehorn Kamala Harris into their speeches. Here’s JD Vance on Wednesday night: Other speakers previewed what I expect to be the top two attacks if Harris becomes the nominee. One, she was in charge of the border and therefore responsible for the chaos that is so prominent in Republican rhetoric. Not to get into technicalities, but she was not specifically responsible for border security; she was in charge of working with countries in the region to stem the flow of migrants. The second attack is classic MAGA conspiracy-mongering — Harris was part of an effort to cover up Biden’s mental infirmities. The former may have some purchase with swing voters; the latter is mostly red meat for the MAGA base, although it could lead to some uncomfortable…