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Both Pennsylvania Democratic Sen. John Fetterman and GOP Sen. Dave McCormick spoke in a bipartisan forum about the importance of border security, with Fetterman going so far as to call out his own party on the issue.

"I've kind of, I've lost some support in my party. I thought the border was really important, and our party did not handle the border appropriately," Fetterman told "Fox News Sunday" host Shannon Bream during a FOX Nation presentation of The Senate Project series on Monday. 

"Look at the numbers, 267,000, 300,000 people showing up at our border. And, you know, we can all agree that's roughly the size of Pittsburgh. Now, that's unacceptable. And that's a national security issue. And that's chaos. So a secure border, being very pro-immigration, that's who I am as a Democrat."…READ MORE

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'RAMPANT': Fetterman, McCormick react to 'astonishing' Boulder attack on pro-Israel group

IDEOLOGICAL VIOLENCE: Boulder, Colorado suspected terror attack suspect Soliman faces murder, assault charges, jail records show

'SUICIDAL MIGRATION': Boulder terror attack puts Biden-era immigration policies in the hot sea

ANTI-AMERICAN': Trump says Boulder terror attack 'will not be tolerated,' deportations must continue

NONCITIZEN: Alleged Boulder terrorist overstayed visa, granted work permit by Biden administration

TERROR IN BOULDER: Holocaust survivor among victims in Boulder, Colorado suspected terror attack

TENSION IN TURKEY: Ukraine, Russia meet for peace talks in Istanbul after explosive weekend

DECEIT REVEALED: Tensions rise as Israel strongly denies firing on Palestinians at Gaza humanitarian site

NATIONALIST COMEBACK: Polish conservative Karol Nawrocki wins presidential election to succeed Duda

‘DEFAMATORY ALLEGATIONS’: China accuses Hegseth of espousing 'Cold War mentality' for labeling country as a threat

IN HOT WATER: Maxine Waters campaign to pay $68,000 for violating campaign finance laws

'UNREAL': Marjorie Taylor Greene slams FDA green lighting of mNEXSPIKE COVID-19 vaccine

FIXING THE UNFIXABLE: As Musk exits DOGE, a look back at previous efforts to cut waste, fraud, and abuse — and how they fared

APPEALS DENIED: Supreme Court declines to examine appeals over Maryland, Rhode Island gun control laws

DEI DOLLARS: Hundreds of millions in tax money goes to contracts for DEI groups, watchdog finds

‘UPS THE ANTE’: US government taking ‘dramatically different approach’ using terrorism charges against drug cartels: FBI alum

Get the latest updates on the Trump administration and Congress, exclusive interviews and more on FoxNews.com.

FIRST ON FOX – The Department of Justice demanded California’s public high schools confirm by next week that they do not allow transgender athletes to compete in girls’ sports, escalating a federal inquiry into the state over its compliance with Title IX.

Assistant Attorney General Harmeet Dhillon, who heads the DOJ Civil Rights Division, said in a letter obtained by Fox News Digital that public school districts must "certify in writing" by June 9 that they will not abide by the the California Interscholastic Federation’s gender identity rules.

"Knowingly depriving female students of athletic opportunities and benefits on the basis of their sex would constitute unconstitutional sex discrimination under the Equal Protection Clause," Dhillon warned in the letter, obtained by Fox News Digital. 

CALIFORNIA HIGH SCHOOLER BEGS STATE OFFICIALS TO BAN TRANS ATHLETES FROM GIRLS SPORTS AT CONTENTIOUS MEETING

The California Interscholastic Federation governs public and private high school sports in the state and has a bylaw that requires its members to recognize gender identity in sports.

All students should be able to participate in school sports "in a manner that is consistent with their gender identity, irrespective of the gender listed on a student’s records," the bylaw states.

Dhillon, a former California-based conservative attorney, said the certifications she is seeking from the public school districts will "ensure compliance" with Title IX and help them to "avoid legal liability."

Her demand pits public school districts against the California Interscholastic Federation, the entity that schools are required to comply with to participate in state sports competitions.

DOJ INTERVENING IN CALIFORNIA TRANS ATHLETE CONTROVERSY AS TRUMP MONITORS GIRLS' TRACK AND FIELD CHAMPIONSHIP

Fox News Digital reached out to the California Interscholastic Federation’s executive director for comment.

Dhillon's move comes after she and the U.S. attorney for the Central District of California announced last week that they were investigating the California Interscholastic Federation and other public entities over whether the state's laws conflicted with Trump's interpretation of Title IX.

When Trump took office, he ordered federal agencies to enforce Title IX in a manner that excluded gender identity after the Biden administration attempted to reinterpret the statute.

Title IX, passed in 1972, is a landmark civil rights law designed to prevent sex discrimination in schools. Former President Barack Obama made the first, albeit unenforceable, attempt to reinterpret Title IX at the end of his term by directing schools that received federal funds to allow transgender students to use bathrooms and participate in sports that corresponded to their gender identities.

Trump quashed those efforts in his first term and, in coordination with former Education Secretary Betsy DeVos, underwent a lengthy process of creating new rules within the Education Department to require schools to adhere to the long-held meaning of Title IX.

Former President Joe Biden made embracing gender identity and re-imagining Title IX a pillar of his presidency by moving to unravel the Trump administration's new rules. Biden was, however, met with numerous injunctions and never able to get his version of Title IX off the ground.

TRUMP DOJ, EDUCATION DEPT FORM TASK FORCE TO PROTECT FEMALE ATHLETES FROM 'GENDER IDEOLOGY' IN SCHOOLS, SPORTS

Now, Trump has aggressively sought to enforce his first term's rules. He signed a string of executive orders focused on, as one order described it, the "biological reality of sex," and his agencies have sent demand letters and opened federal inquiries into states that are resistant to the administration's efforts.

In addition to targeting California, the DOJ sued Maine over Title IX, arguing its state Education Department was out of compliance with federal law, citing a transgender athlete who won a girls' pole-vaulting competition in February.

Maine Gov. Janet Mills (D) has downplayed the matter, telling local news at one point that there were "like two" transgender athletes in her state.

California Gov. Gavin Newsom (D), meanwhile, has shown an openness to Trump's position that transgender athletes competing in girls' sports is unfair, to the chagrin of some of Newsom's liberal base.

Newsom also recently said he supported a new pilot initiative by the California Interscholastic Federation to allow any female track and field athlete who would have qualified for an upcoming state championship to compete if they had been displaced by a transgender athlete.