abc.com | First Lady Michelle Obama brought renewed energy to the NAACP today, delivering the keynote speech at the annual convention one day before the nation's largest civil rights group is expected to condemn what it calls racist elements in the Tea Party movement.

The nation's largest and oldest civil rights organization will vote on the resolution Tuesday during its annual convention in Kansas City, Mo.

In her speech, the first lady focused on the issue of childhood obesity and her "Let's Move" initiative, but outside of her remarks, anti-Tea Party activism has been a key focus of the gathering, which conservative leaders say is driven solely by a political agenda.

Tea Party members have used "racial epithets," have verbally abused black members of Congress and threatened them, and protestors have engaged in "explicitly racist behavior" and "displayed signs and posters intended to degrade people of color generally and President Barack Obama specifically," according to the proposed resolution.

"We're deeply concerned about elements that are trying to move the country back, trying to reverse progress that we've made," NAACP spokeswoman Leila McDowell told ABC News. "We are asking that the law-abiding members of the Tea Party repudiate those racist elements, that they recognize the historic and present racist elements that are within the Tea Party movement."

The National Association for the Advancement of Colored People, in coordination with 170 other groups, including labor unions, is planning a protest march in Washington, D.C., Oct. 2 as the next step in building momentum against the Tea Party.

The "One Nation" march is designed as an antithesis to the Tea Party, and it's about "pulling America together and back to work," McDowell said.