Final answer:
In the US Senate, there is a high chance that the incumbent will win office due to the incumbent advantage.
Step-by-step explanation:
In the US Senate, the incumbent advantage refers to the higher chances of the incumbent winning office compared to new candidates. Historically, incumbents in both the Senate and the House enjoy high rates of reelection, which is often referred to as the incumbent advantage or the incumbency effect. In fact, between 1946 and 2012, only 5 percent of incumbent senators lost their party primaries, and in 2014, no incumbent senators suffered defeat. The advantage in financing, name recognition, and the ability to attract more money are some of the reasons why incumbents win a large majority of congressional races.