Matsui is almost guaranteed a victory.
Something like 37 of 38 widows have won their deceased husbands seat.
The last one in California lost -- Congressman Joe Baca beat the widow of Congressman George Brown. Below is the opening in the story the day after the election. (She should have conceded. lol)
September 22, 1999
SAN BERNARDINO, California -- The widow of Democratic Rep. George E. Brown Jr. has apparently failed to advance to a runoff after losing a special election for her husband's seat, but has refused to concede the election.