Stock Market Today: Dow, S&P 500 Futures Drop Ahead Of Trump's 'Power Plant Day' Deadline— UnitedHealth, Silo Pharma, Phillips 66 In Focus (UPDATED)

(Editor’s note: The future prices of benchmark tracking ETFs, the lede, the economic data and the headline were updated in the story.)
U.S. stocks pared earlier gains to drop on Tuesday, following Monday’s advances. Futures of the major benchmark indices were lower ahead of President Donald Trump’s deadline to destroy Iran’s energy and civilian infrastructure if it failed to reopen the Strait of Hormuz.
​In manufacturing data, new orders for U.S. durable goods fell 1.4% to $315.5 billion in February, marking a sharper contraction than the revised 0.5% decline seen in January. This represents the third consecutive month of decreasing orders, adding another layer of macroeconomic data for investors to digest alongside current geopolitical and market developments.
Over the weekend, Trump had