(CNN) - Two Kennedy family associates tell CNN's John King that Paul Kirk, longtime senior aide to the late Sen. Ted Kennedy, is the family's favorite to fill his vacant Senate seat - and that the late senator's sons have relayed this view to Gov. Deval Patrick.
Asked if Patrick is on board, one of these sources said "it is 75 percent there."
On Tuesday, the Massachusetts Senate passed a bill that would allow Patrick to appoint a temporary replacement for Kennedy until an election can be held to fill the seat in January. That measure is now up for final consideration by both chambers of the legislature.
Update: One source tells CNN's Gloria Borger that Vicki Kennedy, Ted Kennedy's widow, also favors the appointment of Paul Kirk to fill her late husband's vacant Senate seat.