Christian Science Monitor: President Obama will address the nation from the Oval Office for the first time Tuesday night in a bid to convince the American public that, in his response to the Gulf oil spill, he is more Lyndon Johnson than George W. Bush. For weeks, Americans have been clamoring for Mr. Obama to show more outward resolve and leadership in facing the crisis. In short, it has been asking him to be more like President Johnson, who did not merely respond to hurricane Betsy in 1965, he became …