Breakfast shows can fail if the anchors don't have compatible chemistry. But the on-air flirtation can go too far. Case in point: Joe Scarborough and Mika Brzezinski of MSNBC. The former Republican congressman-now reinvented as a liberal darling of cable news-hosts a show called Morning Joe with Brzezinski, daughter of Jimmy Carter's cold-war national security advisor. As this clip shows, Scarborough and Brzezinski-both married, Scarborough for the second time-have an exceedingly warm relationship; they'd better tone it down a bit because their on-air antics have convinced MSNBC grunts the two are pursuing an off-camera affair.