NBC News: “Democrat Joe Biden holds a narrow lead over President Donald Trump in the all-important battleground state of Pennsylvania, while the two candidates are tied in Arizona, according to the final NBC News/Marist state polls of the 2020 presidential election. In Pennsylvania, which Trump won four years ago, Biden is ahead by 5 points among likely voters, 51 percent to 46 percent, although that advantage is within that poll’s margin of error; a combined 3 percent say they’re undecided or are voting for someone else. In Arizona, which Trump won by more than 3 points in 2016, the candidates are tied at 48 percent each among likely voters, with a combined 4 percent undecided or voting for someone else.”