Ilhan Omar Jerga gave an ominous prediction of the watch: "They probably received the goods."

The Oversight Project's Mike Howell warns that the attack on HSI Ilhan Omar reflects deeper failures of congressional accountability and predicts further revelations.

The watchdog warns of deeper problems in Congress that the "other shoe" may drop in the Omar investigation

A federal raid on the Washington, D.C., home of U.S. Rep. Ilhan Omar on Wednesday prompted warnings from a conservative leader about more revelations as the Minnesota Democrat faces separate investigations into his immigration records and financial disclosures.

Mike Howell, head of the Oversight Project, whose group worked to strip Omar of $1.031 million in appropriations, said the Homeland Security Investigations (HSI) search raises broader questions about Congress's accountability and what investigators might uncover next.

His warning comes as U.S. Attorney Jeanine F. Pirro confirmed to America Reports that her office is investigating the Minnesota Democrat's financial disclosures, while separate reports indicated that federal investigators have subpoenaed Omar's relatives as part of an immigration probe.

Federal agents raid DC Ilhan Omar's home amid immigration fraud investigation

"That's why I think the Democrats really couldn't resist the temptation to jump out of this situation before they saw the evidence and just circle the wagons [around Omar]," he said.

Democrats' anger over Ilhan Omar's attack Admirable reminder of governments about attacks from the past: "Set the record straight"

"I'm saying that they seem to be going back a bit. It's gone from a blanket defense of Omar to a non-substantive one, talking about 'well, this stuff was old' or 'it's political because he's Ilhan Omar.'

Howell suggested that the arguments of Omar's advocates show that "it's not all peaches and cream under the hood."

WATCH: Ilhan Omar Denies US Federal Forces Contacted Him After Tzar Homan Confirms 'Criminal' Investigation

Howell's warning goes beyond Omar and extends to what he describes as a broader failure of accountability in Washington, where lawmakers can support taxpayer-funded projects and later face questions about their legitimacy.

Ilhan Omar's husband insists he is not "concerned" amid a federal immigration investigation

Federal investigators have issued more than a dozen subpoenas as part of the immigration investigation, including subpoenas for Omar's family members.

Former prosecutor says Democrats have their hands dirty with complaints about Omar's attack weeks before the election

However, Howell argued that obtaining a search warrant for a member of Congress in Washington showed that investigators had obtained substantial evidence, although the warrant only proved that the judge had probable cause to believe that the search would uncover evidence or other items subject to seizure, not that Omar had committed a crime.

Howell cited what he saw as a unique combination of circumstances — an HSI investigation into the Trump administration, a ruling upheld by a federal judge in Washington, D.C., who sided with Democrats and the proximity to the election — as reasons he believes investigators may have substantial evidence.

"They probably delivered the goods to him," Howell said. "You can't get a federal judge to sign off on something like that in Washington, D.C. anywhere, unless there's something compelling."

Jonathan Fahey, a former ICE administrator and federal prosecutor in the neighboring Eastern District of Virginia, said the timing of the HSI search raises questions about whether investigators are reviewing more recent documents related to long-standing immigration claims.

Fahey suggested that knowingly repeating material misstatements in recent federal filings could, depending on the documents, circumstances and applicable laws, create separate statutory disclosure, even if criminal charges based solely on older documents are barred by the statute of limitations.

Former FBI agent Nicole Parker warned that Omar might not face criminal charges if his father filled out false documents when he was young.

"If his father lied and filled out the [citizenship/naturalization] forms, in my opinion, he would not be criminally responsible," Parker said.

However, Parker said Omar could face a separate legal question if authorities prove he obtained his citizenship through false information.

"If his citizenship was obtained under false pretenses and false information, it could potentially result in revocation and loss of citizenship," he said.

In January, the Oversight Project challenged a proposed $1.031 million appropriation for the MN Justice Empowerment Initiative in Minneapolis, a project supported by Omar and Minnesota's Democratic senators.

"We said, 'Let's check those signs,'" Howell recalled.

Conservative Republicans subsequently opposed the funding, with Rep. Chip Roy, R-Texas, among those pushing to eliminate it.

The designation was revoked, and Sens. Mike Lee, R-Utah, and Joni Ernst, R-Iowa, later asked the Justice Department to investigate the nonprofit.

The funding discrepancy raised questions about congressional vetting of the proposed recipients, but its removal did not establish fraud by Omar or the organization. No connection between the proprietary controversy and the federal investigation has been publicly confirmed.

As part of his broader discussion of "institutional decay," Howell argued that Omar's specific debate was not unique, criticizing what legislators outside the United States consider loyalties to be prior to their legal responsibilities.

"It's not normal. And it only seems normal because it's happened so much. And I think it's time to swear to the constitution that members take that oath seriously," he said.

"If someone is loyal to another place, they shouldn't be in Congress."

Omar has denied wrongdoing and accused the Trump administration of using federal law enforcement against political opponents. His office has called the search an abuse of power and previously cited the Congressional Ethics findings recommending dismissal of allegations related to his financial disclosures, but did not respond to a request for comment for this story.

Cookies, booze, and mocking Nazis add the final fuel to the fiery Texas House race.

Tish James went on camera for accusing Trump of bias in the Cornell rape case

The Democrats' latest push for gun control leads to an unpleasant reality about how to stop a school killer

Obama's star power from black voters is being tested in sensitive Senate race: 'It's a spin-off'