I would have been OK with requiring 5 people to do this.
I think the democrats will use the 1 person rule to block everything. Could they do that? Or is it a requirement that they be in the same party?
It can be either party. The rule was there for a century or more before Pelosi, but rarely used. If invoked, a simple voice vote can quickly put it down, unless there’s a real movement by a large portion of the caucus.