WASHINGTON — The billionaire heir and the former bartender.

US stocks were mixed on Monday, set for a retreat from a historic run of gains as President Trump's new tariff threat revived trade war worries in the wait for a Federal Reserve policy decision.

Palantir Technologies is slated to report quarterly results after the market closes on Monday, and investors are positioning for a big stock move.

President Trump has signaled that US trade deals with unspecified countries are in the pipeline this week as he attempts to ...