McKay Coppins @mckaycoppins
It remains deeply bizarre that the Trump campaign just keeps doubling down on "Biden is old and senile" as their central message. https://t.co/DeUFfDI0r8 — PolitiTweet.org
Will Oremus @WillOremus
Fox News' hosts just called Biden's speech "enormously effective," said it "blew a hole" in the Republican narrative that he's senile.