For a piece of legislation to proceed to the senate, it needs a certain number of votes. The “whip” organizes the votes of the party.
International law is a body of agreements, treaties, maritime conventions, etc. that pertain to relations between countries and/or apply to activities in international waters. National/federal laws are enforced internally by the relevant nation, and are not binding outside the nation's borders.
Yes, Pennsylvanias wiretapping law is a “two-party consent law”. Pennsylvania makes it a crime to intercept or record anyone unless both parties envolved consent.