I do wonder if some undecideds may view Trump as unstable and not want him in charge when there's so much turmoil around the world, but on balance, yes, it's probably not a good thing for Harris. Particularly if the Mideast stuff starts to spill over with negative effects on the economy and markets.
..and this has been a record warm start to autumn up here. As posted before, on the other extreme was 1995 when I had already had snow falling in Sept with much more in October.