...But the ethics experts eyeing Trump’s empire are now warning of many others [in addition to Turkey], found among a vast assortment of foreign business interests never before seen in past presidencies. At least 111 Trump companies have done business in 18 countries and territories across South America, Asia and the Middle East, a Washington Post analysis of Trump financial filings shows...

A group of ethics advisers, including former chief White House ethics lawyers during Democratic and Republican administrations, wrote Trump a letter Thursday urging him to sequester his business in a genuine blind trust or commit to a “clear firewall” between his Oval Office and his family.

“You were elected to the presidency with a promise to eliminate improper business influence in Washington,” they wrote. “There is no way to square your campaign commitments to the American people — and your even higher, ethical duties as their president — with the rampant, inescapable conflicts that will engulf your presidency if you maintain connections with the Trump Organization."...