Regional Interests Sen. Dianne Feinstein Is at the Top of D.C.’s Seniority Ladder. Does it Matter? KQED Published October 16, 2018 at 5:21 PM PDT Twitter LinkedIn Email How much does seniority matter in the U.S. Senate? Plenty, according to several Washington, D.C. analysts KQED reached out to. But it’s not everything. Copyright 2018 KQED