I'm waiting for some actual polling before I declare that it helped Trump, but the biggest dynamic I think could be at play is any of the "traditional" Republicans who were willing to go over to Biden, but now might decide to "come home" for the sake of a SCOTUS seat. I really doubt that will be enough people to actually swing the election, but it might be a decent chunk of at least Biden's crossover Republican support.
Almost everyone knew that RBG was would not make it past 2024, so whoever won the election would be filling her seat, if she didn’t die before the 2020 election. Anyone changing their vote because of this is somehow too low-info to realize that RBG would die soon, but somehow high-info enough to care about the Supreme Court
