American University professor Allan J. Lichtman has developed a combination of historical facts and factors that together provide a context for the presidential campaign and an early indicator of the results.

The following is one of the 13 Keys to the White House he has devised. It takes a true or false answer. In the commentary section, you can also share your views on the related question.

Key 3 (Incumbency): The incumbent party candidate is the sitting president. True or False?

Tell us what you think. Do you believe it is good to change parties after one term or two? Does the incumbent party have an advantage or disadvantage and what are those? Once we have compiled your answers to all 13 keys, we will do a follow-up report on the results.

More: Campaign Watch: Keys to the White House | The 13 Keys