Senator Ted Cruz, the right-wing Republican from Texas, will declare for president on Monday according to reports, becoming the first official candidate for the White House job in 2017.

But he was born in Canada so he cannot run for president right?

Wrong. It appears his Irish American mother can make him eligible.

Cruz, (44),  has already been labelled ‘Black Irish’ by MSNBC commentator Chris Matthews, who said Cruz has “a black Irish look.”

In a very negative note back in June, Matthews compared him to anti-Semite Father Charles Coughlin and rabid anti-Communist Senator Joe McCarthy.

"I think [Cruz] fits in the tradition of Father Coughlin and McCarthy and, of course, maybe to a lesser extent, Pat Buchanan and, of course, [Bill] O'Reilly."

Cruz was born in Calgary, Alberta, Canada, where his parents, Eleanor Darragh and Rafael Cruz, were working in the oil business. His father fought the right wing Batista regime in Cuba before fleeing.

But what makes him eligible to run for president?

mother was born and raised in Delaware, in a family of Irish and Italian descent.

Cruz has said, "I'm Cuban, Irish, and Italian, and yet somehow I ended up Southern Baptist."

Cruz has been visiting early primary states. National Review, the conservative bible, has urged him to run. “It is an undercurrent and growing,” Texas GOP consultant Bill Miller told the Washington Post . Now Cruz has decided to take the plunge.

Jeff Judson, a major tea party figure in Texas wants him to run too.

“Yes, there is a buzz about Cruz running for president, but a different kind of buzz than with other prior candidates,” Judson said.

“He has serious gravitas - more than all the 2012 Republican presidential candidates combined.”

But is he a “natural-born citizen,” as the 14th Amendment says presidents must be?

Cruz’s mother was a U.S. citizen when he was born so he is a U.S. citizen too regardless of where he was born. But does that make him  a “natural-born citizen.”

Legal scholars say most likely yes, but it has never been tested.

Democrats in 1967 tried to disqualify George Romney, Mitt’s father, because he was born in Mexico. But a New York Law Journal piece at the time made a very persuasive case otherwise. The debate goes back to President Chester Arthur, who many claimed was born in Canada.

The nonpartisan Congressional Research Service has found that candidates like Cruz “most likely” qualify as natural-born citizens.

“The weight of more recent federal cases, as well as the majority of scholarship on the subject, also indicates that the term ‘natural born citizen’ would most likely include, as well as native born citizens, those born abroad to U.S. citizen-parents, at least one of whom had previously resided in the United States, or those born abroad to one U.S. citizen parent who, prior to the birth, had met the requirements of federal law for physical presence in the country,” wrote Jack Maskell.

So Ted Cruz may have his Irish American mother to thank for his eligibility to run for president.