Jared Kushner has been appointed as a senior adviser to the president, Donald Trump's transition team announced in January.

The appointment raised questions about anti-nepotism laws, as Kushner is married to Trump's eldest daughter, Ivanka Trump. The Department of Justice, however, said in a letter dated Jan. 20, 2017 — the same day Trump was inaugurated — that Kushner's appointment does not break any anti-nepotism laws.

Kushner was a close adviser to Trump throughout his campaign, and his involvement has been credited as being one of the major reasons Trump won the election.

A Nov. 22 feature on the real estate developer in Forbes suggests that, without Kushner, Trump may not have won.

“Jared Kushner is the biggest surprise of the 2016 election,” Eric Schmidt, former CEO of Google, told the magazine. “Best I can tell, he actually ran the campaign and did it with essentially no resources.”

Here are seven more things to know about the president's son-in-law.