Ready for yet another reason to watch ABC’s BROTHERS & SISTERS, how’s this? According to TVGuide, former WEST WING Democrat Rob Lowe is joining the cast of BROTHERS & SISTERS as, get this, a REPUBLICAN (gasp!) senator who falls for Calista Flockhart’s Kitty when he guests on her show “Red, White & Blue.” Let’s hope Lowe isn’t the last WEST WINGER to show up on Kitty’s show. With Bartlett leaving the White House, fan favourites C.J. and Toby no doubt have a lot of free time on their hands. 