There is no evidence that Paul Manafort was working with President Trump or other administration officials on the talks, which stemmed from 2017 discussions on Chinese investment.
Officials are scrutinizing the work of L. McCrae Dowless Jr., who has worked for Democratic and Republican politicians in North Carolina, as they investigate claims of fraud.
The C.I.A. has evidence that Mohammed bin Salman communicated with a key aide around the time that a team believed to have been under the aide’s command assassinated Jamal Khashoggi.
The end for Mr. Bush was remarkably peaceful after a life that took him from the skies of the Pacific during World War II to the Oval Office at the end of the Cold War.
As a businessman, candidate and president, Mr. Trump has demanded loyalty of advisers, including an embrace of his habitual boasts, misstatements and outright falsehoods.
Mr. Bush, a Republican, was a transitional figure in the White House, where he served from 1989 to 1993. He was the last of the World War II generation to occupy the Oval Office.