The Dow spent almost the whole session in the red, as troubling trade tweets from President Donald Trump and a sharp sell-off for newly downgraded Pfizer (PFE) overshadowed positive earnings reactions for blue chips Procter & Gamble (PG) and Merck (MRK). Losses were modest, though, as traders digested a round of economic data ahead of tomorrow's Fed decision, including a tame update on inflation. Pfizer (PFE) paced the 20 decliners with its 6.4% drop, while Procter & Gamble (PG) led the 10 advancers with its 3.8% gain.