Stocks ended at session lows and with the worst losses of the year as the shine of the Trump rally wore thin. The S&P 500 declined by more than 1% for the first time in more than 100 sessions. The financial sector was one of the worst performers on doubts over whether President Trump can pass regulatory reform. Major banks including Bankof America (BAC) - Get Report , JPMorgan (JPM) - Get Report and Wells Fargo (WFC) - Get Report were the hardest hit. Campbell Soup (CPB) - Get Report tumbled after it was downgraded from MARKET PERFORM to UNDERPERFORM at Bernstein. The firm said revenue trends are deteriorating and that consumers are showing a preference for fresher food. General Mills (GIS) - Get Report fell after sales came in slightly weaker than forecast. The consumer foods company reported a 5.2% drop in quarterly revenue.