NYT:

Hillary Rodham Clinton will begin personally courting donors for a super PAC supporting her candidacy, the first time a Democratic presidential candidate has fully embraced the independent groups that can accept unlimited checks from big donors and are already playing a major role in the 2016 race.

Her decision marks another escalation in what is expected to be the most expensive presidential campaign in history. Mrs. Clinton’s allies hope that with her support, Priorities USA Action, the top Democratic super PAC, will be able to raise as much as $200 million to $300 million, on par with what the largest Republican organizations, such as the Karl Rove-founded American Crossroads super PAC and its nonprofit affiliate, spent in 2012.