Well, here it is--America has NEVER had an election between two SITTING Senators before.

[Bicoastal]

Never.

The only possible exception is Sen. James Buchanan of Pennsylvania, who beat out Sen. John C. Fremont of California for the Presidency in 1856.

However, Fremont had been out of office for 5 years, while Buchanan had already served 4 years under James K. Polk as Secretary of State before his nomination.

All the others had since assumed other positions, such as the Presidency or Vice Presidency, before facing another Senator.

But it's going to happen this year...