In a first, only one TV outlet — MSNBC — will be allowed to deliver live coverage of Saturday’s South Carolina Democratic Convention where 21 presidential candidates are expected to speak, drawing heated complaints from other networks.

C-SPAN, which has never been denied live coverage of a state convention in the network’s 40 years, has reluctantly pulled out of the convention and other weekend events sponsored by the party. CNN has filed a complaint. Fox will also be barred from providing live coverage to its viewers.