But Rep. Adam Schiff, D-California, said, "There is no precedent for not even showing up" to testify.

CNN: House inches toward constitutional showdown with contempt vote

"Just because the FBI didn't find derogatory information about the suspects doesn't mean it wasn't there to be found, " said Rep. Adam Schiff, D-Calif.

NPR: Obama: Review Of Boston Attack Information Sharing

"This information was put in a database, it was shared among different agencies, it was shared with a joint terrorism task force, and that's exactly what should happen, " U.S. Rep. Adam Schiff, D-California, told CNN.

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