A party line (multiparty line, shared service line, party wire) is a local loop telephone circuit that is shared by multiple telephone service subscribers.

What is a bipartisan vote?

A bipartisan vote is one in which a majority of Republicans and a majority of Democrats vote the same way. In a house where the two parties are nearly evenly balanced, a few defections will be very costly to the (slim) majority party, and party-line votes may prevail.

What happens if you dial 0?

Its now reserved as a prefix for international dialing. If you dial just a zero nowadays, nothing will happen, because more digits are expected.