In this Nov. 3, 1999 file photo, Robert Trump, left, joins then real estate developer and presi …

In this Nov. 3, 1999 file photo, Robert Trump, left, joins then real estate developer and presi ...

In this Nov. 3, 1999 file photo, Robert Trump, left, joins then real estate developer and presidential hopeful Donald Trump at an event in New York. President Donald Trump’s younger brother, Robert Trump, has been hospitalized in New York, according to the White House. The president is expected to visit his 72-year-old brother at a hospital in Manhattan on Friday. (AP Photo/Diane Bonadreff)