Impossible to say but Harris is winning the popular vote for sure. I think however it goes there's going to be some chaos and violence, I wouldn't be surprised if there's blatant attempts by MAGA cultists to sabotage what they can and drag out the vote counting and electoral processes. Its probably going to be a shitshow, and possibly a horrorshow. I don't expect it to be called on election night unless its a significant and obvious win, which currently seems very unlikely. I would be less surprised if there was a terrorist attack on election night than a clear and obvious conclusion to the election.

Congress I think Dems are likely to outperform, the RNC is no longer what it was and doesn't have the ground game they used to. All their money and resources have been sucked into the black hole of Trumps campaign.