The border czar said the move is in response to a law signed by New York’s governor last month.
Brown will be committed to a federal facility for treatment with resumption of his trial contingent on his being declared competent.
After a final vote, the bill will go to President Donald Trump for his signature.
Six in ten respondents supported the changes.

The lawsuit argued that the rule change would make electricity more expensive and stop renewable energy projects from being built.
California’s 45th Congressional District is considered one of the state’s remaining competitive House races.
The vessel’s crew didn’t comply with directions from the U.S. military, CENTCOM said.
The Pentagon also argued that Anthropic’s claim under the Administrative Procedure Act is not subject to judicial review.
American Airlines has suspended some of its routes amid rising fuel costs, while Spirit Airlines shut down operations last month.
The designation prevents the Pentagon from procuring from the listed firms.
‘When criminal aliens exploit the naturalization process by breaking the law, there are consequences,’ the acting attorney general said.
The expected vote comes as splits among moderate Republicans about a so-called anti-weaponization fund create uncertainty around the final outcome of the vote.
The president’s also said U.S. forces would be involved in the removal of nuclear material from within Iran.
U.S. war secretary urges Europe to confront immigration crisis.
The president said the program now covers four out of five U.S. prescriptions and has saved consumers more than $400 million.
Republican Steve Hilton is narrowly following Democrat Becerra.
On June 5, California gubernatorial candidate Steve Hilton announced an emergency election count accelerator plan.
Five minors and 44 women were among the illegals caught by authorities.