and daniel weiss is director of climate strategy at the center for american progress, a liberal policy group. gentlemen, welcome. simply, kenneth green can the president-- this president, any president-- push down the price of gas? >> sure they can, but not as much as people might think. about 75% of the price of gas is the world price of oil. but there's a federal gas tax that can be changed, the e.p.a. requirements for specific fuel blends that can be changed. so it's not quite true to say the president has no power but it's not as big as some people might like. >> suarez: daniel weiss, can the president change the price of gas if he or she wants to? >> well, when this happened in 2008 president george w. bush said "i would wave a magic wand if i could to lower prices but there's no such thing." and this's true for this president as well. there is no magic wand to wave. prices are high due to several factors. first, there's some supply disruption in the middle east. second that there is a lack of... there's a... increased demand from asia and then third wall street speculators and oi