Tammy Baldwin (WI):

According to Ellis Insight:

Sen. Baldwin was placed on the potential retirement list for a reason similar to Sen. Kaine being included.  The Fox News analysis cited Sen. Ron Johnson’s (R) tight victory – 50.4%; 26,728 vote margin of 2.65 million ballots cast – as an indication that the state is becoming more favorable to Republicans.

This is the first time there has been a hint that Sen. Baldwin is a retirement possibility, and a close 2020 Senate race at the same time a Democratic Governor was being re-elected should not be indicative of any future voting trend in a state that either party can win.  There is little current reason to think that 60-year-old Sen. Baldwin would retire.  Therefore, fully expect her to be on the ballot next year competitively vying for a third term.