Qatar has offered financial help to Trump's son in law Jared Kushner, Haaretz reported.
Kushner, a senior White House adviser, was a close ally of Saudi Crown Prince Mohammed bin Salman - a key architect of a regional boycott against Qatar, which Riyadh accuses of sponsoring terrorism. Doha denies the charge.
Brookfield, a global property investor in which the Qatari government has placed investments, struck a deal last year that rescued the Kushner Companies' 666 Fifth Avenue tower in Manhattan from financial straits.
The bailout, in which Doha played no part and first learned about in the media, has prompted a rethink of how the gas-rich kingdom invests money abroad via its giant sovereign wealth fund, two sources with knowledge of the matter told Reuters.