Washington Week In Review Replacement Host
I always found Robert Costa way too willing to normalize Donnie, and when he had some 'news', he routinely mentioned he had spoken to Repubs on the hill.
Anyway, they've been trying out different substitute hosts, and most are more suited to their network correspondent positions, but I think Yamiche Alcindor would be a good replacement host. She works for NBC and PBS, and seems to have very good sources, as she's come up with some rather big scoops. She also does a good job of not allowing politicians to not answer questions, which is likely why Donnie hated her so much, among other reasons.
You should let WWR know who should be the replacement host. Their email contact page is here:
https://www.pbs.org/weta/washingtonweek/webform/contact
Their twitter account is @washingtonweek but I'm not seeing much in the way of external postings.