George W. Bush's presidency can't end soon enough. Many Americans are fatigued by the state of the nation: a relentless war in Iraq, a bottomless deficit, the bruising mortgage crisis and the United States' flagging image abroad. So it is not hard to be energized by the prospects for a successor. When Marylanders vote in Tuesday's presidential primary, both Democratic choices are promising a new political era for this century, and each has the intellect and the skills to deliver. Hillary Clinton, with her years in Washington and most recently in the Senate representing New York, brings rich experience. She is tough and keenly focused, pragmatic and driven. But Barack Obama, her Senate colleague from Illinois, offers a more compelling vision for the country that he would lead. He wants to forge a new reality in Washington where consensus replaces confrontation. And he has shown a remarkable ability to enroll a diverse array of Americans in his cause, convincing a new generation that it too has a stake in Washington.