Total: 16 (11 Democrats and 5 Republicans)

As of January 4, 2007

Democrats
1. Boxer, Barbara -- CA
2. Cantwell, Maria -- WA
3. Clinton, Hillary - NY
4. Feinstein, Dianne - CA
5. Klobuchar, Amy -- MN

6. Landrieu, Mary - LA
7. Lincoln, Blanche - AR

8. McCaskill, Claire -- MO
9. Mikulski, Barbara - MD
10. Murray, Patty - WA
11. Stabenow, Debbie -MI

Republicans
1. Collins, Susan - ME
2. Dole, Elizabeth - NC
3. Hutchinson, Kay Bailey - TX
4. Murkowski, Lisa -AK
5. Snowe, Olympia --ME