RALEIGH, N.C. — Politicians in Texas, Arkansas and elsewhere vowed defiance – and other conservative states could follow suit – after the Obama administration told public schools across the U.S. on Friday to let transgender students use the bathrooms and locker rooms that match their gender identity.

The federal government’s guidance was met with tearful praise from parents of transgender students.

“It’s heartbreaking that these kids are losing their lives because they can’t be accepted,” Hope Tyler, who has a transgender son at a Raleigh high school, said in reference to suicides among transgender people. “Somebody has to speak for the kids.”

The directive from the U.S. Justice and Education Departments represents an escalation in the fast-moving dispute over what is becoming the civil rights issue of the day.

One by one, conservative political leaders thundered against it and President Obama.

“This is the most outrageous example yet of the Obama administration forcing its liberal agenda on states that roundly reject it,” said Mississippi Republican Gov. Phil Bryant.

The guidance was issued just days after the Justice Department and North Carolina sued each other over a state law requiring transgender people to use the public bathroom that corresponds to the sex on their birth certificate. The law applies to schools and many other places.

While supporters say the measure is needed to protect women and children from sexual predators, the Justice Department and others argue the threat is practically nonexistent and the law discriminatory.

The guidance issued on Friday is not legally binding, since the question of whether federal civil rights law protects transgender people has not been definitively answered by the courts and may ultimately be decided by the Supreme Court.

But schools that refuse to comply could be hit with civil rights lawsuits from the government and could face a cutoff of federal aid to education.

Texas’ lieutenant governor said the state is prepared to forfeit billions rather than let the Obama administration dictate restroom policy for its 5.2 million students.

“We will not be blackmailed by the president’s 30 pieces of silver,” Republican Lt. Gov. Dan Patrick said.

Rodney Cavness, superintendent of the Port Neches-Groves school district in Texas, told KFDM-TV: “When I get that letter, I’ll throw it away.”

Similarly, Republican Gov. Asa Hutchinson of Arkansas said schools should disregard the directive, which he derided as “social engineering.”

Governors and top leaders in other conservative states railed against the guidance but stopped short of telling schools to ignore it.

“The last time I checked, the United States is not ruled by a king who can bypass Congress and the courts and force school-age boys and girls to share the same bathrooms and locker rooms,” North Carolina’s Republican Senate leader Phil Berger said.

And Kentucky Gov. Matt Bevin said: “It is difficult to imagine a more absurd federal overreach into a local issue.”

However, Democratic Govs. Peter Shumlin of Vermont and Jay Inslee of Washington praised the Obama directive, saying it was consistent with their own policies.

“I applaud the Obama administration for establishing policies that will better provide all our children an opportunity to thrive,” Inslee said.

The federal guidance may portend more court fights over transgender bathroom access.

Already, officials from eight states – West Virginia, Arizona, Kansas, Nebraska, Texas, Utah, Maine and North Carolina – signed on to a brief in recent days asking a federal appeals court to re-hear a case in which it sided with a Virginia transgender student seeking to use the boys’ bathroom.

The new guidance says public schools must treat transgender students in a way that matches their gender identity, even if their education records indicate a different sex.

Some school systems around the country already accommodate transgender students in bathroom use.

Nearly half the high schools in the 53,000-student Seattle district have gender-neutral restrooms.

The National School Boards Association has published guidelines for its members in dealing with transgender students. It stops short of telling them exactly what to do, instead advising them to work with their attorneys to determine the best course amid a “shifting legal landscape.”