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Wall Street set for a weak open after Trump hints at government shutdown

U.S. stock index futures pointed to a lower open on Wednesday as investors digested remarks from President Donald Trump.

Dow Jones industrial average futures fell 62 points, while S&P 500 and Nasdaq 100 futures declined 8.75 points and 21.25 points, respectively.

At a rally in Phoenix, Trump said he would keep his campaign promise of building a border wall even "if we have to close down our government." Trump also said he doubts a renegotiation of the North American Free Trade Agreement is possible.

Trump's remarks came after the administration has faced a couple of turbulent weeks due to a shakeup in staff and comments made Trump following the violent protests in Charlottesville, Va.

Investors also awaited key economic data releases ahead of an important monetary policy symposium at Jackson Hole later on this week.

Data to watch on Wednesday, includes the flash US composite purchasing managers' index (PMI) due out at 9:45 a.m. ET, which will be followed by new home sales, set to come out at 10 a.m. ET.

Michael Nagle | Bloomberg | Getty Images

On the central bank front, Dallas Fed President Robert Kaplan is set to speak at the Permian Basin Petroleum Association Membership Luncheon in Midland, Texas on Wednesday.

This speech comes just before central bankers meet later this week at Jackson Hole.

At the event, Federal Reserve Chair Janet Yellen and European Central Bank President Mario Draghi are both set to speak, with investors watching the event closely for any indications when it comes to monetary policy outlook.

, oil prices came under pressure in morning trade as oversupply concerns returned to the market after Libyan output showed signs of recovery.

At 7:59 a.m. ET, U.S. crude hovered around $47.63 per barrel, while Brent stood at $51.50.

Overseas, traded mostly lower in morning trade, while finished mostly mixed. In the previous session, on renewed hopes of tax reform in the U.S.

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