Harris said she had run out of money, but she at least enjoyed a stretch when she rose up and got a close look from voters and the media before plummeting. Booker hasn’t even had that moment yet, baffling many of his supporters and some political analysts who wonder why a 50-year-old senator who has tried to appeal to a broad cross section of Democrats hasn’t drawn more interest, especially as many in the party worry that none of their top candidates check all the right boxes. Booker’s polling support has been mired around 2% to 3%, short of the 4% nationally or 6% early-state backing required to appear in the December debate.