Sorry to necro an old thread, but there's a precinct in Knoxville (10-W) where virtually the entire population is in UTK's Sorority Village. It voted for Trump by a fairly amount in 2016 (68%-25%) and then had a tie in 2020.
Unfortunately, only 18 votes were cast in precinct 10W in 2020, so I'm not sure how usable these results are. In 2018, the precinct voted 22 to 12 for Lee but 21 to 12 for Bredesen.
There were 69 votes cast there in 2016, so this may have been a result of the unusual circumstances of the 2020 election. We'll see how many votes are cast in that precinct next month.