Trump's biggest office tenant at his 5th Avenue tower could become a big headache

Marty Lederhandler/AP Donald Trump’s biggest office tenant at his namesake Fifth Avenue tower could become one of his biggest headaches. The state-owned Industrial & Commercial Bank of China, the world’s biggest lender measured by assets, occupies 20,404 square feet of office space at Trump Tower. The bank’s lease is set to expire in 2019, and renewal negotiations could run Trump afoul of a little-known piece of the U.S. Constitution meant to avoid conflicts of interest. The “emoluments�...