WaPo:

As part of an escalating feud with the Democratic National Committee, longshot presidential hopeful Martin O’Malley on Tuesday released a memo from a campaign lawyer calling the party’s debate plan “legally problematic.”

O’Malley, the former Maryland governor, has strongly objected to the schedule released last week of six DNC-sanctioned debates, branding it “undemocratic” and arguing that the public deserves more opportunities to size up frontrunner Hillary Rodham Clinton against other candidates.

The memo released Tuesday takes issue with an “exclusivity” requirement, under which any Democratic candidate who participates in a non-sanctioned debate could be barred from the DNC-sponsored debates, the first of which is in October.

Joe Sandler, a former DNC general counsel whose services have been retained by O’Malley’s campaign, argues in the memo that such a requirement is unprecedented and that the DNC has no legal authority to enforce it. The memo was first reported by MSNBC.