While no law prevents outside donors, for example, from investing in the campaign of a low-income person, the likelihood that they’ll do so is low. The problem is social capital: Low-income people lack it, and so their personal networks do not often contain millionaires with open pocketbooks. “A lot of times the need to fundraise large amounts of money prevents a lot of people who are qualified and who are leaders in that community from running for office because they don’t have networks that include wealthy donors,” said Allie Boldt, a Washington, D.C.-based counsel for the think tank Demos. [...]