President Joe Biden would get a big boost in a three-way race alongside Donald Trump and Robert Kennedy Jr., a new NPR/PBS NewsHour/Marist poll shows. Among respondents, Biden wins 44 percent compared to Trump’s 33 percent and Kennedy’s 16 percent. Just 3 percent were undecided. When comparing the two major party candidates in a direct race, Biden’s lead narrows from a 7-point advantage to a 3-point advantage among registered voters nationally, with Biden scoring 49 percent to Trump’s 46 percent and 5 percent undecided. “Kennedy’s presence erodes Trump’s lead among independents and cuts into his support among Republicans,” Marist Poll said in its results. “Trump’s loss among his base is double the loss Biden experiences among Democrats.”