ABC News' Tahman Bradley and David Chalian Report: Sens. John McCain and Barack Obama have been invited to town hall meetings at the Presidential Libraries of Ronald Reagan and Lyndon Johnson.
The invitation, sent to the candidates by former first lady Nancy Reagan and the Johnson daughters, Lynda Johnson Robb and Luci Baines Johnson, does not suggest a specific date or lay out details about a proposed format. The invitation is for the town halls to take place in July.
The selection of a moderator, how the audience will be chosen, and how the questions are screened editorially all need to be worked out with the campaigns.
Sen. McCain, R-Ariz., challenged Obama to a series of 10 town hall meetings this summer, saying he wants forums where the candidates take questions directly from voters. Obama, D-Ill., has said he's open to engaging McCain in town hall-style meetings in the coming weeks.
The candidates turned down an invitation by ABC News and New York Mayor Michael Bloomberg to a joint town hall meeting at Federal Hall in New York City. McCain held a town hall Thursday without Obama and slammed the senator for so far not accepting an invitation to debate. "I think this town hall meeting tonight would have been a little bit more interesting if Senator Obama had accepted my invitation," he said.
ABC News' Bret Hovell contributed to this report.