The Senate rejected all four gun control measures that were up for consideration on Monday.
The final vote, with a 47-53 tally, blocked a proposal to bar all gun sales to those individuals on the terror watch list, the second time the proposal went down to defeat after a mass shooting.
California Democratic Sen. Dianne Feinstein's amendment to an annual spending bill would have screened those on a broad government database, and mandated that anyone who was on the list in the previous five years as the subject of a federal terror investigation be subjected to additional review.
Feinstein pushed the proposal in December after a shooting in San Bernardino, and revived it after the horrific shooting at an Orlando nightclub last week by a gunman who pledged allegiance to the terror group ISIS Republicans who opposed the measure argued that many people mistakenly end up on the federal terror watch list, and say the measure was overly broad and would violate individuals' Second Amendment rights.