(Washington D.C.)  --  Senators Amy Klobuchar and Al Franken are among lawmakers asking President Obama for more aggressive action to keep Asian carp out of the Great Lakes.  The plea comes after a 20-pound Asian carp got around electric barriers in the Chicago area and was found a short distance from Lake Michigan.  Environmental groups warns the fish could eventually get into Lake Superior.  Darrell Gerber with Clean Water Action Minnesota says Asian carp can grow to be very large -- sometimes more than a hundred pounds.