Texas Democratic gubernatorial candidate Wendy Davis is trailing GOP rival Greg Abbott in the final weeks of the race. (AP Photo/Eric Gay, File)

First Lady Michelle Obama lends Democratic gubernatorial candidate Wendy Davis some star power in a new radio ad going up in the Lone Star State, spotlighting the Davis campaign's focus on education issues.

“For Wendy, education is a top priority because she wants to give all our kids the chance to build a better life for themselves and for their families. That’s what the American dream is all about," the first lady says in the 60-second radio clip.

Michelle Obama connects Davis’s compelling personal history to her support for increased education spending in the state. Davis has frequently denounced education cuts supports a statewide, full-day pre-K program.

“Wendy knows something about the American dream. She was the daughter of a single mother, and by age of 19 she was a mother herself,” says Obama. “But Wendy worked hard. She went onto college and Harvard Law School. Wendy Davis knows the power of education."

The first lady has emerged as a top Democratic surrogate this election cycle, filling in for President Obama in key states where he is unpopular. Earlier this week, she starred in her first television campaign ad of the year, for embattled Illinois Gov. Pat Quinn. But even with Obama's help, the Davis campaign is facing an uphill battle in the final weeks of the campaign, with recent polls showing her GOP rival Greg Abbott leading by double digits.

Abbott also has the financial edge in the final stretch of the race. The Dallas Morning News reported earlier this week that Davis has just $5.7 million dollars left in her campaign account, compared with the $30.1 million in the Abbott war chest.

The radio ad was paid for by the Davis campaign.