I think it's far too early to call the D5 race given how many vote-by-mail ballots are still to be counted, and the relative skew of the vote-by-mail versus election-day ballots.

It's always a question of why vote by mail ballots would look different than election-day... But we saw in the last mayoral that they are different, though I don't know why

I think it's reasonable to expect VBM and e-day voters to have different demographics (e.g., income, age, employment status, how well informed they are) that influence their choice of whether to vote by mail or in person and also influence their votes.