Presidents in Congress Trivia Question

[Slacker]

First, for the interests of honesty, this is for an extra credit question on a midterm I've got. I've looked all over Wikipedia and various books, and been unable to find an answer, so I turn to you, the SDN population at large.

There have been two Presidents who ran against each other for the same seat in Congress. I need to know who they are. I'm sure this is one of those trivia pursuit sort of questions someone's had in the past, and would remember. Any help would be greatly appreciated.

[Samuel]

What is the exact wording? It could mean Lincoln vs Douglas, but that wouldn't be two presidents running against each other.

One moment.

[Samuel]

I couldn't find anything else. I think it is Lincoln and Douglas. They fought over the Senate seat and they fought over the Presidency. He was the Democratic candidate in 1860.

[Slacker]

Yeah, that's what I thought as well, the only thing was he implied it was two presidents, not two people who ran for president.

[Slacker]

Apparently Madison and Monroe ran against each other.