And while charisma is not essential to a president's success—leaders ranging from Harry Truman to Lyndon Johnson showed that one can get a lot done without a special ability to reach the masses—it can be enormously helpful in marshaling support for a president's agenda. Most observers expect Obama to focus, first and foremost, on the troubled economy, and seek support for the massive "rescue" package he is now developing with congressional leaders. "He needs to give a sober message and call for sacrifice because there will be tough times ahead," says a senior Democratic strategist. "But he will also need to send a message of hope."
If done right, Obama's inaugural address could set the tone for his entire administration, following in the pattern of Lincoln, Roosevelt, Kennedy, and Reagan.