Some Senate Democrats are reiterating their call for President Obama to reform vast aspects of the National Security Agency’s (NSA) surveillance efforts.

In a letter on Friday, Sens. Mark Udall (D-Colo.), Ron Wyden (D-Ore.) and Martin Heinrich (D-N.M.) told the president to halt the collection of Americans’ phone records, reform the secretive Foreign Intelligence Surveillance Court and prevent warrantless searches of Americans’ communications.