We'll need ranked choice (or some other voting scheme other than First Past The Post). Otherwise it'll just end up the same as it always has.

[citation needed]

https://www.snopes.com/fact-check/lincoln-masters-court-congress/

Right, forgot about that...

It's hard to say whether it was the stroke, the exposure to DC, or a combination of both... But considering other progressive senators seem capable of (mostly) holding true to their campaign promises/personality, it's more likely due to the stroke.

Edit: missing "progressive" modifier