Former President Barack Obama shut down speculation Monday that his wife Michelle Obama would run for president in 2020, although she is encouraging Americans to cast their ballot in the 2018 midterm elections.

The former first lady is "not running for president, but she is out there telling you to vote because the antidote to government by the powerful few is government by the organized, energized many," the 44th president said during a rally in Las Vegas.

[WATCH: Obama hosts Las Vegas rally, Oct. 22, 2018]

The Obamas have hit the campaign trail to give the Democrats a campaign boost ahead of the 2018 midterm elections, which are just over two weeks away.

"We get the leaders we vote for. We get the policies we vote for. And when we don't vote, that's when we wind up with government of, by, and for other people," Michelle Obama said at a Nevada high school last month.

Michelle Obama has previously said that she will not run for office in 2020, noting that she believes if someone wants to run for office, “you have to want the job.”

"I've never had the passion for politics," she said. "I just happened to be married to somebody who has the passion for politics, and he drug me kicking and screaming into the arena."