Partisanship versus bipartisanship Congress has alternated between periods of constructive cooperation and compromise between parties, known as bipartisanship, and periods of deep political polarization and fierce infighting, known as partisanship. The period after the Civil War was marked by partisanship, as is the case today. It is generally easier for committees to reach accord on issues when compromise is possible. Some political scientists speculate that a prolonged period marked by narrow majorities in both chambers of Congress has intensified partisanship in the last few decades, but that an alternation of control of Congress between Democrats and Republicans may lead to greater flexibility in policies, as well as pragmatism and civility within the institution. Procedures Sessions A term of Congress is divided into two "sessions", one for each year; Congress has occasionally been called into an extra or special session. A new session commences on January3 each year unless Congress decides differently. The Constitution requires Congress to meet at least once each year and forbids either house from meeting outside the Capitol without the consent of the other house. Joint sessions Joint sessions of the United States Congress occur on special occasions that require a concurrent resolution from House and Senate. These sessions include counting electoral votes after a presidential election and the president's State of the Union address. The constitutionally mandated report, normally given as an annual speech, is modeled on Britain's Speech from the Throne, was written by most presidents after Jefferson but personally delivered as a spoken oration beginning with Wilson in 1913. Joint Sessions and Joint Meetings are traditionally presided over by the speaker of the House, except when counting presidential electoral votes when the vice president (acting as the president of the Senate) presides. Bills and resolutions Ideas for legislation can come from members, lobbyists, state legislatures, constituents, legislative counsel, or executive agencies. Anyone can write a bill, but only members of Congress may introduce bills. Most bills are not written by Congress members, but originate from the Executive branch; interest groups often draft bills as well. The usual next step is for the proposal to be passed to a committee for review. A proposal is usually in one of these forms: Bills are laws in the making. A House-originated bill begins with the letters "H.R." for "House of Representatives", followed by a number kept as it progresses. Joint resolutions. There is little difference between a