US Senator Robert Byrd (L),D-WV, listens to Sen. Edward Kennedy,D-MA, before bill signing ceremonies in this 15 June, 2006 file photo at the Eisenhower Executive Office Building in Washington, DC. Legendary Democratic patriarch Senator Edward Kennedy has a malignant brain tumor, doctors said on May 20, 2008, sending a wave of sadness and shock through the US political establishment. The most emotional comments came from 90-year-old Senator Robert Byrd, the only man currently in the Senate who has served longer than Kennedy. "Ted, my dear friend, I love you, and I miss you ... thank God for you, Ted. Thank God for you." Kennedy is an unapologetic liberal and an orator who recalls a bygone era of stemwinding political rhetoric, but has reached out to work with Republicans.