TX: Cruz +5, Trump +7

OH: Brown +2, Trump +6

FL: Scott +2, Trump +4

Margin of error is ±3% in Texas and Ohio, and ±3.6% in Florida.

Marist is a very good pollster, so this is pretty good news for Harris and co. The one thing that I note with Marist, however, is that Harris doesn't match Biden's numbers with Black voters. Now, it isn't fair to compare polling with the final results of a previous election, but it is interesting. Though, when exclusively Black voters in battleground states were polled by Fox (a very good pollster) Trump's ceiling is at about 12%. So there is a very real possibility that Harris's support among black voters is being understated because of the small subsections of the polls.

Edit: It is also interesting to note that Trump is running ahead of the other GOP candidates. That wasn't the case in 2016 or 2020.