(CNN) - John McCain's presidential campaign is challenging Barack Obama to join it in accepting invitations from both the Ronald Reagan and Lyndon B. Johnson presidential libraries to appear at joint town hall meetings there in July.
"The American people deserve a great debate about the future of our country, and we hope that Barack Obama will join us for these important events at these historic venues," Jill Hazelbaker, the McCain campaign's communications director, said in a statement.
McCain campaign manager Rick Davis also sent a letter Friday to his counterpart at the Obama campaign, David Plouffe, urging again that the two candidates hold several joint town hall meetings this summer.
"We remain committed to this idea because joint town hall meetings offer the best format for presenting both candidates' visions for our country's future in a substantive way," Davis wrote. "We have a chance to change the way presidential elections are run and elevate the political dialogue. Americans deserve this kind of opportunity, and we hope that Senator Obama will join us at town hall meetings throughout the summer months."