Nate Silver @NateSilver538
Our (soon-to-be-published) national polling average over time: March 1: Biden 49.7, Trump 45.6 (+4.1) Apri 1: Biden 49.2, Trump 43.1 (+6.1) May 1: Biden 49.5, Trump 43.4 (+6.1) June 1: Biden 49.2, Trump 42.9 (+6.3) June 15 (today): Biden 50.2, Trump 42.1 (+8.1) — PolitiTweet.org