Mitch McConnell and Rand Paul. (John Gress/Reuters)

Senate Minority Leader Mitch McConnell (R-Ky.) joined Sen. Rand Paul's filibuster about 12 hours into the marathon, 13-hour speech. Now he's using the speech as an opportunity to raise funds for his own reelection.

In an e-mail, McConnell asks his supporters to sign a petition declaring, "I stand WITH Rand Paul and Mitch McConnell. They are shining examples of Republican leadership."