I think this is a fair question. I used the word capable on purpose.
I don’t think George Bush is capable of lifting the Embargo. He certainly does not seem to have any interest in having it lifted first of all. Second of all, he is in bed politically with all the old exiles in Miami.
So, in my opinion, Raul is actually more capable of lifting the Embargo. He has implied that he would like to negotiate with the US. If he releases some political prisoners and schedules open elections for something like 2009, the Democrats just might make a decisive move to ease, lift and/or defund the Embargo.
I say Raul is more capable of lifting the Embargo than George Bush.