From the AP:

Florida Gov. Ron DeSantis and former United Nations Ambassador Nikki Haley are increasingly outsourcing central parts of their campaigns, drawing on the growing urgency of Donald Trump opponents to find a single alternative to the former president.

Struggling to energize his campaign, DeSantis this week privately encouraged his donor network to support a newly formed super PAC that’s taking over advertising responsibilities. That’s after a leadership shakeup at the pro-DeSantis super PAC that for months has been handling the bulk of both his advertising and his get-out-the-vote operation.

At the same time, Haley’s self-described “scrappy” political campaign, which has never enjoyed the same level of funding or manpower as DeSantis’ operation, won the support of the the Koch network, the largest conservative grassroots organization in the nation. By week’s end, scores of Koch-backed activists are expected to begin advocating on Haley’s behalf at the doorsteps of tens of thousands of Republican primary voters.

The extraordinary reliance on independent groups for the two Republicans who increasingly appear to be Trump’s closest challengers is testing the practical and legal limits of modern-day presidential campaigns.