The developing rivalry between potential Presidential candidates Hillary Clinton and Barack Obama is the talk of the Senate, today's Washington Post reports. The paper offers an intimate (if at times frivolous) look at the ways the behind-the-scenes machinations of this rivalry are playing out.

One example: The Obama campaign's "unofficial motto" is, "Don't tell Mama, I'm for Obama." "Mama" is a reference to Clinton's nickname as former First Lady, the paper says. The paper also claims (though based on very thin sourcing) that "Obama's explosive rise has startled Clinton and her advisers, who are mulling how to react."

The full piece is here.