Two-wheel drive

Two-wheel drive (2WD) describes vehicles with a drivetrain that allows two wheels to receive power from the engine simultaneously.

Four-wheeled vehicles

For four-wheeled vehicles (and by extension, vehicles with six, eight, or more wheels) this term is used to describe vehicles that are able to power at most two wheels, referred to as either front or rear-wheel drive. The term 4×2 is also used, to denote four total wheels with two being driven. Most road vehicles use a 2WD layout due to its light weight and simplicity. Traction on the road is usually sufficient that the driving force can be reliably transmitted through only two wheels.

For vehicles that have part-time four-wheel drive, the term refers to the mode when 4WD is deactivated and power is applied to only two wheels.

Two-wheeled vehicles

For two-wheeled vehicles such as motorcycles and bicycles, the term is used to describe vehicles which can power the front as well as the back wheel. The term 2×2 is also used to denote two total wheels with both being driven. 2×2 vehicles are typically either mechanically driven via chain or shaft or are hydraulic driven. This scheme greatly improves offroad performance, but is quite complicated and requires more power to operate, thus most 2WD machines are either "exotic" bikes for enthusiasts or created with special uses in mind.

Bernie Sanders

Bernard "Bernie" Sanders (born September 8, 1941) is an American politician and the junior United States Senator from Vermont. He is a candidate for the Democratic nomination for President of the United States in the 2016 U.S. presidential election. A Democrat as of 2015, Sanders had been the longest-serving independent in U.S. congressional history, though his caucusing with the Democrats entitled him to committee assignments and at times gave Democrats a majority. Sanders has been the ranking minority member on the Senate Budget Committee since January 2015, and previously served for two years as chair of the Senate Veterans' Affairs Committee.

Sanders was born and raised in the New York City borough of Brooklyn and graduated from the University of Chicago in 1964. While a student, he was an active civil rights protest organizer for the Congress of Racial Equality and the Student Nonviolent Coordinating Committee. After settling in Vermont in 1968, Sanders ran unsuccessful third-party campaigns for governor and U.S. senator in the early to mid-1970s. As an independent, he was elected mayor of Burlington, Vermont's most populous city, in 1981, and was reelected three times. In 1990, he was elected to represent Vermont's at-large congressional district in the U.S. House of Representatives. In 1991, Sanders co-founded the Congressional Progressive Caucus. He served as a congressman for 16 years before being elected to the U.S. Senate in 2006. In 2012, he was reelected with 71% of the popular vote. During the 2016 presidential primaries, Sanders became the first self-described democratic socialist and first Jewish American to win a presidential primary of a major party, namely the New Hampshire primary.