German Chancellor Angela Merkel at the White House

Iranian President Mahmoud Ahmadinejad has demanded a public apology from Barack Obama over claims that Washington has interfered in Iran's internal affairs. Speaking at a joint press conference with German Chancellor Angela Merkel, President Obama responded that the US had "gone out of its way not to interfere with the election process in Iran," and suggested that Ahmadinejad should “ consider looking at the families of those who have been beaten or shot or detained.” Michael Fletcher is White House correspondent for the Washington Post.