The incumbent is the current holder of a political office. To vote "non-incumbent" would mean to vote for the challenger to the incumbent's position.
An incumbent is one who currently holds a political position and is running for that position again. One advantage an incumbent has is name recognition. The voting public has heard their name before as well as they know more about how they have sided on issues in the past increasing the chances of reelection.
Because the House of Representatives has a term of two years and must run another election campaign to maintain his or her seat, this is a disadvantage compared to an incumbent senator. A senator has a term of six years and has more time to develop a strong voting base to help ensure his or her reelection.
The possessive form for the singular noun incumbent is incumbent's.
The incumbent is the current office holder, the "challanger' is the person running against the incumbent
Barack Obama is the incumbent president.
Barack Obama is the incumbent democratic president.
The incumbent in an election is the current office-holder. For the 2012 Presidential race, the incumbent is Barack Obama.
Depending on the size of the voting district, it can be difficult to unseat an incumbent member of Congress as they are already established. It is particularly difficult if the voting population is set in its ways and unlikely to vote in someone new.
an incumbent
the incumbent (your mom) the incumbent (your mom)
An incumbent is an elected official who holds an office and is running for reelection.