could affect all of us, including our own mail delivery. i m wolf blitzer, you re in the situation room. jtsdzer. it all begins in iowa. right now many of the republican presidential candidates are in that state, a state that holds the lead-off contest in 2012. they re working the crowds at the state fair before tomorrow s pivotal iowa straw poll. and they re taking direct aim at president obama s handling of the debt crisis and the u.s. economy. listen to some of the republican hopefuls, including sarah palin, who insists she still hasn t decided whether to run. i think the question should be asked, is the president responsible for the down grade? i would say yes. from the top, that leadership starts from the top. look what happened two weeks ago. when barack obama s back was against the wall. what did he do to try to scare americans to call their members of congress? he threatened social security recipients that their money wouldn t be there. he threatened medicare