Donald Trump is tapping someone very close to him as a senior advisor. His son in law. Jared Kusher is, like his father in law, a real estate developer — whose new job is raising questions about nepotism and conflicts of interest. Josh Robin reports.

He helped Donald Trump win — now, he's helping him govern. Ivanka Trump's husband Jared Kusher, whose soothing whisper is said to be one of the few voices Trump will heed.

"As one political consultant who knows Kushner told me, there were three campaign managers, there was only one son-in-law," said Andrew Rice of New York Magazine.

A son-in-law with similarities, both grew up outside Manhattan, to develop real estate within it.

Kushner's flagship is 666 Fifth Avenue — a couple blocks south of Trump Tower.

Both also thirst for the public eye, in different ways — Trump starring in a reality show and Kushner owning the New York Observer.

Kushner's loyalty is said to have separated him from his Manhattan social circle.

And some question how a religious Jew can stand by a candidate seen as reluctant to disavow anti-Semitic supporters. 

But those dreading Trump see Kushner as a moderating link.

Mayor Bill de Blasio calls him reasonable.

"I've been talking to him over these last weeks, he's someone I intend to stay in touch with on behalf of the people of New York City," de Blasio said.

Kushner comes from a political family — a family of Democrats who helped raise money for the very top of that party's ticket. It also is a family with a criminal history that is shaping - years later - what Trump's administration will look like."

Jared's father served a year in federal prison for tax evasion among other charges.

The prosecutor who put him away? New Jersey governor Chris Christie — who hasn't landed a new job under Trump.

"Chris Christie has sort of slunk back to new jersey where he has like a 15 percent approval rating last I checked," said New York Magazine's Andrew Rice.

Rice, who wrote this week's cover story on Kushner, says his exact portfolio isn't known.

Trump has talked about him helping to solve the Israeli-Palestinian conflict.

Federal anti-nepotism law is murky but the good government group common cause already questions whether Kushner should be hired, citing inherent conflicts-of-interest that quote seem impossible to overcome.

Trump is scheduled to hold his first news confrence since being elected on Wednesday, and NY1 will bring it to you live.