Outside fundraising groups plow ahead toward 2020, with or without Democratic nominee

"We've reached a point where candidates have more to gain by actively opposing super PAC activity ... than they have to gain from secretly blessing it," said Adav Noti, senior director of the nonpartisan Campaign Legal Center and a former associate general counsel at the Federal Election Commission. In this election cycle, Priorities USA has distanced itself from backing any specific candidate in the primary. But down the line, for the sole candidate at the top of the Democratic ticket, the support of a big-money group like Priorities USA could undermine the grassroots brand.

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