Garrison Keillor, far from his prairie home, draws crowds in D.C.
When Garrison Keillor comes to Washington, he usually carves out time to stroll through McPherson Square and visit the National Gallery. But there's one site he has yet to visit. "I may be one of the few people who has been to Washington 30, 40, a hundred times and I've never been inside the Lincoln Memorial," said Keillor, gazing out the window of his new Twin Cities bookstore, just blocks from where he made his 197…