As he accepts his party's nomination at the Republican National Convention tonight, Mitt Romney will reach out to disaffected supporters of President Obama by arguing that the current president promised too much and has offered far too little. 

"Hope and Change had a powerful appeal," he will say, according to excerpts from the speech released in advance. "But tonight I'd ask a simple question:  If you felt that excitement when you voted for Barack Obama, shouldn’t you feel that way now that he’s President Obama?"

Romney says his promises will be more modest. 

"President Obama promised to slow the rise of the oceans and to heal the planet. My to help you and your family," he said. "What is needed in our country today is not complicated or profound. It doesn't take a special government commission to tell us what America needs. What America needs is jobs. Lots of jobs."

As his running mate did Wednesday night, Romney will set a goal of creating 12 million jobs in four years, along with energy independence by 2020.   

Romney will also speak at length about his time at the private equity firm Bain Capital, describing it as "a great American success story." And he will reach out to women voters -- a demographic that favors the president -- by highlighting his mother's Senate campaign and the women he hired at Bain and in Massachusetts.