On Tuesday, U.S. Senator Dianne Feinstein denounced the C.I.A. for allegedly spying on the Senate intelligence committee, specifically the committee's probe into a C.I.A. detention program. The charges have split top lawmakers, who either support Feinstein or say it's too early to draw conclusions. We look at how Feinstein's allegations could impact the national debate on surveillance.

• More: Feinstein Publicly Accuses C.I.A. of Spying on Congress (NY Times)
• More: Dianne Feinstein's CIA charge scrambles Senate (Politico)
• More: CIA Tampered With Senate Panel's Work, Feinstein Says (NPR)