episodes, but tonight, pat sajak takes the wheel for a final spin. >> well, the time has come to say goodbye. >> reporter: and for millions of fans... >> we'll! of! fortune! >> reporter: the show will never be the same. sajak took over the show in the early 1980s. his cohost, vanna white, with him nearly the entire ride. she will continue on with the new host, ryan seacrest. >> what an incredible and unforgettable journey we've had. and i've enjoyed every minute of it. >> margaret: new federal rules tonight from the biden administration will require cars to average more miles per gallon, but it isn't as dramatic as the white house previously recommended, especially when it comes to gas guzzlers like suvs and pickups. the push to get more electric vehicles on the road comes as a new aaa survey finds 63% of consumers are unlikely to buy an