(CNN) – House Speaker John Boehner and Sen. Marco Rubio of Florida will campaign for Mitt Romney this week as the GOP presidential nominee faces off on the debate stage for the first time in the general election.
Rubio, once considered a top contender as Romney's running mate, will attend a rally Tuesday in Las Vegas, close to the site of President Barack Obama's debate preparation in Henderson, Nevada.
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The president is scheduled to stay in Henderson as he gears up for Wednesday night's showdown in Denver. Romney, meanwhile, travels to Colorado on Monday.
Rubio's event comes one day after Ann Romney, Romney's wife, also holds a rally in Henderson.
Boehner, meanwhile, heads to Florida - another crucial battleground state - to appear at a morning event Tuesday in Naples.
– CNN's Ashley Killough contributed to this report.