(CNN) - Jon Stewart is not a newsman, but polls show he has the reach of one at the top of his profession. He's not a politician or an activist, but he's set to host a rally expected to draw tens of thousands to Washington's National Mall.
And with President Obama ready to appear on his Comedy Central show Wednesday - less than a week before the midterm elections - Stewart is reconfirming that he's more than just an entertainer and satirist.
Obama will be the first sitting U.S. president to appear on "The Daily Show With Jon Stewart" when it airs Wednesday night. He's been on ABC's "The View," NBC's "The Tonight Show," and other programs as president. But the show Obama picked for an appearance days before the midterms - with Democrats anxious to turn out the voters who helped propel him to the presidency in 2008 - is Stewart's.