During a trip on Tuesday to Nevada, Michelle Obama stumped for healthy living and for U. S. Senate Majority Leader Harry Reid.

It has been reported that Reid, D-Nev., faces an uphill fight for re-election in November, and party leaders hope the first lady's visit will give him a boost. He introduced Obama when she spoke at Red Rock Canyon National Conservation Area outside Las Vegas. Obama pushed her "Let's Move" program, touting the benefits of outdoor exercise.

She said, "And it's not just a health crisis, as Senator Reid said. It's an economic crisis. We are spending nearly $150 billion a year to treat obesity-related illnesses. And if we don't act now, if these kids now grow up to be adults, then that number is just going to continue to go up."

The Reno (Nev.) Gazette-Journal has reported that some Democrats expressed hope Obama's trip will help invigorate the party's base around Reid's re-election effort.

State Assemblywoman Sheila Leslie, who is running for state Senate, said, "We all need it. She generates a ton of enthusiasm in the base. And anything that gets our voters more engaged in the political process is good."

Following a morning of seminars about finances, clean energy and healthcare, Obama delivered the keynote address at the 2010 Women's Summit in Reno.

Obama's visit could help Reid, whose low approval rating has him pegged as one of the most vulnerable Democrats come Election Day, Democrats told the Gazette-Journal. (With Inputs from Agencies)