<p>WASHINGTON (AP) — Investigators working for special counsel Robert Mueller have interviewed one of President Donald Trump’s closest friends and confidants, California real estate investor Tom Barrack, The Associated Press has learned.</p>
<p>Barrack was interviewed as part of the federal investigation of possible collusion between the Trump campaign and Russia in the 2016 election, according to three people familiar with the matter who spoke on condition of anonymity to discuss private conversations.</p>