The Democrats are going on the attack. The Democratic National Convention kicked off officially last night in Charlotte, N.C.  Speakers lashed out at Mitt Romney as the first lady praised her husband.

"Being president doesn't change who you are," Michelle Obama said. "No, it reveals who you are."

Mrs. Obama says her husband still stands behind working families.

"For Barack, success isn't about how much money you make, it's about the difference you make in people's lives," she said.

President Obama and their daughters watched the first lady's speech from the White House. Others at the Democratic National Convention went on the attack.

"Mitt Romney talks a lot about all the things he's fixed," said Gov. Deval Patrick of Massachusetts. "I can tell you Massachusetts was not one of them."

A new face hit the national stage -- Julian Castro, the mayor of San Antonio. He's the first Latino to deliver a keynote address.

"My mother fought hard for civil rights so that instead of a mop, I could hold this microphone," Castro said.

The president is counting on turnout from Latino voters and women in November, but a new ABC News- Washington Post poll shows the percentage of women who approve of the president has dropped eleven points since April.

At the first night of the convention, delegates praised President Obama for helping win approval of health care legislation and for supporting gay marriage and abortion rights.
    
"We cannot trust Mitt Romney to protect our health," said Nancy Keenan, the president of the National Abortion Rights Action League Pro-Choice America. "He would repeal Obamacare, taking away our access to better maternity and prenatal care, and the law's near universal coverage of birth control."
 
Obama arrives in Charlotte today, and tonight former president Bill Clinton speaks.