The Night Begins With the First Lady

CHARLOTTE, N.C. (CNN) — President Barack Obama and Democrats will present their achievements and try to convince voters that they need four more years to bolster the nation at their three-day national convention that begins Tuesday.

Democrats offered a glimpse of issues expected to play a prominent role in this week’s events, releasing their party platform late Monday. It focuses on improving the economic situation for middle-class Americans, a central theme of Obama’s campaign and an issue the party hopes will win votes come November. It also contains language endorsing same-sex marriage for the first time, a move that brings the party’s official stance in line with that of the president, who said for the first time in May that he supports marriage rights for gays and lesbians.

“Over the course of the week, you’ll hear a very different tone than the one that you heard last week in Tampa, which was really essentially one nonstop series of attacks on President Obama,” Rep. Debbie Wasserman Schultz, the chairwoman of the Democratic National Committee, told CNN on Tuesday.

“We’re going to lay out the case for moving the economy forward. President Obama and speakers throughout the week will talk about and have an honest conversation about where we were when he first took office and where we are now after four years of his policies and 29 straight months of job growth in the private sector. And that we need to continue to move forward and we’ve got a ways to go.”

First lady Michelle Obama will address the convention Tuesday night, and former President Bill Clinton headlines the second night before Obama concludes it with his nationally televised address Thursday night.

Romney’s campaign is focused on the question of whether Obama has made life better for Americans, arguing that continued high unemployment and a sluggish economic recovery from the 2008 recession show that White House policies have failed to deliver promised results.

The Democratic platform points to accomplishments made over the past four years, but argues for a second Obama term by saying more work remains on fixing the economy and making the country more secure. It also pins the blame for high debts and a diminished jobs outlook on former President George W. Bush’s administration.

The “are you better off” strategy was famously employed in 1980 by Ronald Reagan, who asked voters that question when running against incumbent Democrat Jimmy Carter at a time of national economic woes. Reagan went on to win, and the Romney campaign has repeatedly invoked his name this year while seeking to link Obama and Carter as failed leaders.

Obama and Vice President Joe Biden launched their counterattacks Monday, telling supporters at Labor Day campaign events that the nation is better off now than it was when the new administration took office in January 2009.

CNN’s Adam Aigner-Treworgy, Kevin Liptak, Peter Hamby and Paul Steinhauser contributed to this report.