• Charlie Pierce of Esquire’s Politics Blog calls in at 10:30am ET / 7:30am PT to talk about the politicization of the Boston Marathon Bombings

• Matthew Breen, Editor-In-Chief of “The Advocate”, joins us in the Los Angeles Bureau at 11:30am ET / 8:30am PT to talk about the Boy Scouts’ movement on allowing gays

• The hospitalized Boston Marathon bombing suspect charged Monday with using a weapon of mass destruction has told investigators that he and his brother were motivated by religion but were not in contact with overseas terrorists or groups, officials said.

• Two men face a bail hearing today after their arrest on charges of plotting a terrorist attack against a Canadian passenger train with support from al-Qaida elements in Iran, authorities said. The case has raised questions about Shiite-led Iran’s murky relationship with the predominantly Sunni Arab terrorist network.

• Flight delays piled up all along the East Coast Monday as thousands of air traffic controllers were forced to take an unpaid day off because of federal sequester budget cuts.

• River flooding that’s already swamping part of the Midwest from Oklahoma to Michigan could get worse today and Wednesday with more rain and snow spreading over the region.