welcome back to "the lead." i'm jake tapper. even more now on our politics lead. hillary clinton saying she cannot control what all those outside groups supporting her do. including but not limited to taking whacks at senator bernie sanders, the guy beating her in the new hampshire polls. but in four days clinton will no longer have that excuse because she'll be standing a few feet away from her rival. let's bring in senior washington correspondent jeff zeleny. the vice president is possibly, possibly preparing to enter the race. he's going to have a big meeting, we're told. >> he is. he is possible. but a big decision is looming for the biden family no question. as the rest of the democratic field heads to las vegas for that first debate, the vice president and his family will gather at their home in wilmington, delaware. it comes as his team is taking new steps and studying the new deadlines. as he charts his future; hillary clinton and the rest of the field have their hands full. hillary clinton in washington today preparing for tuesday's