"Robin Carnahan, the daughter of a former Missouri governor and a U.S. senator, said Tuesday that she is running for the U.S. Senate. Carnahan, currently secretary of state, is a Democrat and will seek the seat being vacated by four-term Sen. Kit Bond, a Republican. The election is next year."
I believe Carnahan would be the 13th legacy currently serving as a U.S. senator.
When did the U.S. Senate become the British House of Lords?