Khizr Khan, the father of a slain Muslim U.S. soldier, who condemned Republican nominee Donald Trump at the Democratic National Convention, has deep ties to both Saudi Arabia's government and a pay-to-play scheme bringing Muslim migrants into the U.S.

And on Tuesday, he suddenly deleted his law firm's website from the Internet.

According to screenshots captured by the Internet archiving website Wayback Machine, Khan is a lawyer who helps obtain EB5 immigration visas and offers other "Related Immigration Services."

The EB5 visas allow wealthy foreigners – such as migrants from China, South Korea, Mexico and the Middle East – to get green cards if they invest in American jobs.

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"In effect, rich people can buy American citizenship, and that's made it controversial in an era of wariness about immigration," wrote Atlantic reporter Alana Semuels. "Most of them are doing it because they want the green card and it's the fastest or best way to get a green card."

The program has been widely criticized as being "especially susceptible to corruption and of questionable worth."

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Khan's ties to Saudi Arabia

Perhaps more curious is Khan's work history at Hogan Lovells Llp, an American firm contracted by the Saudis to work for the Royal Embassy of Saudi Arabia until 2016, according to the Washington Free Beacon.

The Free Beacon noted, "Robert Kyle, a lobbyist from the firm, has bundled $50,850 for Clinton's campaign," and it added: The Saudi government has "supplied the Clinton Foundation with millions. The Kingdom of Saudi Arabia has given between $10 and $25 million to the foundation while Friends of Saudi Arabia has contributed between $1 and $5 million."

That connection led FrontPage Magazine's Robert Spencer to ask: "Is Saudi Arabia trying to manipulate the U.S. presidential election?"

"Might the government of Saudi Arabia, which has spent countless billions of dollars spreading the virulent and violent Wahhabi strain of Islam around the world, have any interest in making sure that a presidential candidate who speaks more forthrightly about the Islamic terror threat than any presidential candidate has since John Quincy Adams, and who has vowed to take concrete steps to counter that threat, is defeated? Is that why Khizr Khan, brimming with self-righteous indignation and misleading disinformation about the relationship of Islamic jihad terrorism to Islam, was not only featured at the Democratic National Convention but has dominated the news cycle ever since?"

Spencer continued, "The real foreign influence story in this election involves the Saudis and the Democrats. Saudi influence in Washington must end. Khizr Khan represents an all-out effort by the mainstream media and the Democratic Party establishment to maintain that influence. In light of that, Donald Trump was right to answer his attacks, and should have been even stronger in his responses. It's time for the United States of America to regain its independence."

Related columns:

"The Khizr Khan con," by Joseph Farah

"Khizr Khan's Saudi ties" by Robert Spencer

EB5 visa program: A national security risk?

As for the EB5 visas Khan procures, U.S. Senate Judiciary Committee chairman Sen. Chuck Grassley, R-Iowa, recently issued a statement scorching the "flawed" program.

"Maybe it is only here on Capitol Hill – on this island surrounded by reality – that we can choose to plug our ears and refuse to listen to commonly accepted facts," Grassley said in his February statement. "The Government Accountability Office, the media, industry experts, members of Congress, and federal agency officials, have concurred that the program is a serious problem with serious vulnerabilities. Allow me to mention a few of the flaws."

Grassley said the EB5 program even poses a national security risk.

Related columns:

The Khizr Khan con by Joseph Farah

Khizr Khan's Saudi ties by Robert Spencer

"There are also classified reports that detail the national security, fraud and abuse. Our committee has received numerous briefings and classified documents to show this side of the story," Grassley said in the early February 2016 statement. "The enforcement arm of the Department of Homeland Security wrote an internal memo that raises significant concerns about the program. One section of the memo outlines concerns that it could be used by Iranian operatives to infiltrate the United States. The memo identifies seven main areas of program vulnerability, including the export of sensitive technology, economic espionage, use by foreign government agents and terrorists, investment fraud, illicit finance and money laundering."

As WND reported, Khan, who was accompanied on stage by his wife Ghazala Khan, appeared on stage at the DNC last Thursday criticized Trump for proposing to temporarily halt migration from countries that have exported Muslim terrorists and to build a wall on America's southern border.

Khan accused Trump of proposing to violate the U.S. Constitution, apparently presuming the Constitution forbids vetting foreigners who want to enter the U.S. from countries known to harbor terrorists.

Khan later said Trump is a “black soul,” and Trump responded with a tweet insisting Khan has "no right” to criticize him in a public forum.

Kahn's son, Capt. Humayun S. M. Khan, was killed in Iraq in 2004 after he confronted a bomb-packed taxi that drove into a compound while he was inspecting soldiers on guard duty. He told the soldiers to drop to the ground then went to stop the car, which exploded, killing him and two Iraqi soldiers. He was buried in Arlington with full military honors and posthumously awarded a Bronze Star and Purple Heart.

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Media and Republicans blast Trump

On Saturday, Trump issued a statement calling Khan "a hero" and urging vigilance in defeating radical Islamic terrorism.

"Captain Humayun Khan was a hero to our country and we should honor all who have made the ultimate sacrifice to keep our country safe," Trump said. "The real problems here are the radical Islamic terrorists who killed him, and the efforts of these radicals to enter our country to do us further harm."

Trump explained that with the "state of the world today, we have to know everything about those looking to enter our country, and given the state of chaos in some of these countries, that is impossible."

"While I feel deeply for the loss of his son, Mr. Khan who has never met me, has no right to stand in front of millions of people and claim I have never read the Constitution, (which is false) and say many other inaccurate things. If I become president, I will make America safe again."

On NBC's "Today" on Monday, Khizr Khan said, referring to Trump, "this candidate amazes me – his ignorance."

"He can get up and malign the entire nation – the religions, the communities, the minorities, the judges," Khan said. "And yet, a private citizen in this political process, in his candidacy for the stewardship for this country – I cannot say what I feel? That proves the point: He has not read the Constitution of this country.”

As WND reported, despite Trump's statements calling Capt. Humayun S. M. Khan a "hero," Republican lawmakers have piled on Trump, accusing him of defaming Khizr Kahn.

In addition to reports that Khan has pulled his website off the Internet, Breitbart's Matthew Boyle notes:

"Khan revealed that he spent nearly a decade working for the mega-D.C. law firm Hogan & Hartson – now Hogan Lovells LLP – which connects him directly with the government of Saudi Arabia and the Clintons themselves. Saudi Arabia, which has retained the firm that Khan worked at for years, has donated between $10 million and $25 million to the Clinton Foundation. Hillary Clinton, despite the repeated urging of Trump, has refused to return the Clinton Cash money to the Saudis. What’s more, Hogan Lovells also did Hillary Clinton’s taxes – and helped acquire the patents for parts of the technology she used in crafting her illicit home-brew email server that the FBI director called 'extremely careless' in handling classified information."