A Democrat on the Federal Communications Commission wants to see changes that could narrow the scope of new net neutrality rules set for a vote on Thursday. 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...