Mignon Clyburn, one of three Democrats on the FCC, has asked Chairman Tom Wheeler to roll back some of his provisions before the full commission votes on them, FCC officials said.

The request — which Wheeler has yet to respond to — puts the chairman in the awkward position of having to either roll back his proposals, or defend the tough rules and convince Clyburn to back down.

It's an ironic spot for Wheeler, who for months was considered to be favoring weaker rules than those pushed for by his fellow Democrats, before he reversed himself and backed tougher restrictions on Internet service providers.

Clyburn's objections complicate the highly anticipated vote and add an extra bit of drama to the already high tensions on the five-member commission.

Wheeler will need the votes of both Clyburn and Democratic Commissioner Jessica Rosenworcel to pass the rules, since the two Republicans on the commission are expected to vote against anything he proposes.