Investigators in Congress have been waiting a long time to talk to Jared Kushner, President Donald Trump's son-in-law and top adviser. They'll get to do so behind closed doors on Monday and Tuesday. According to his prepared statement, Kushner will say he did not do anything wrong.

"I did not collude, nor know of anyone else in the campaign who colluded, with any foreign government," the testimony, as obtained by The Washington Post's Philip Rucker, reads.

Whether he did anything wrong — or believes he did anything wrong — Kushner remains a central figure in the broader Trump-Russia investigation. Here's why:

1. He's close to the president

I know, this is obvious. But it's worth pointing out given that this White House is particularly indiscriminate about who's in and who's out. (See: sudden hiring of Anthony Scaramucci as communications director and sudden resignation of Sean Spicer as press secretary). Kushner is family and has been one of the president's closest advisers for the past two years.

Kushner's daily proximity to the president is valuable for investigators as they try to gauge just how deep Trump and Russia relationships went.

2. He was high up in the campaign

One of Kushner's many campaign jobs was outreach to foreign governments for his father-in-law. He was in that job when, in June 2016, Donald Trump Jr. set up a meeting with a Russian lawyer and a series of other connected Russians to get dirt on Hillary Clinton.

According to emails Trump Jr. released, he was also given a heads up that this meeting was part of a Russian government effort to help his father win. And guess whom he invited to this meeting? Then-campaign manager Paul Manafort and Kushner.

The fact that Kushner and Manafort were there suggests the Trump campaign was taking this meeting with connected Russians seriously, said Jeffrey Jacobovitz, a white-collar lawyer who represented officials in the Clinton White House. And it also suggests that, far from raising red flags about potential Russian intervention, the Trump campaign may have embraced their help.

3. He's a focus of the FBI's broad investigation