CNBC's Jim Cramer talks with Treasury Secretary Timothy Geithner about the global economy and what sovereign nations in Europe and around the world are doing to deal with the threat of default.. In this broad-ranging discussion, Geithner tells Cramer growth in the U.S. is weaker than he would like, largely due to the shocks of the past year. The political dysfunction in the U.S. & Europe only adds to the uncertainty, he says.