The Senate on Thursday rejected a resolution written by Democrats that would have required that the Trump administration tell Congress what steps it has taken to comply with court orders involving U.S. deportees imprisoned in El Salvador and to report on the country’s human rights record.

The measure failed on a party-line vote of 45-50. Republicans were unanimously opposed.

Supporters said the resolution was intended to determine if U.S. security assistance had gone to support the detention of U.S. residents in a country that might be violating human rights. It would have amounted to a strong rebuke of President Trump and a challenge to his aggressive deportation drive, which Democrats see as an unlawful overreach.