WASHINGTON — U.S. senators are doing something rare this weekend: Actually working. Well, at least, some senators are. On Friday night only 83 of the Senate’s 100 members showed up for a late night vote, which is only compounding the tangible frustration at the Capitol as lawmakers have seen their schedules upended — including one senator who had to scrap her plan to attend the Super Bowl — over an internal GOP debate that’s now boiled over into public view. Sen. Rand Paul (R-KY) is forcing his colleagues to stay in town this weekend and battle over a now $95.3 billion foreign aid package that…