US President Donald Trump pumps his fist as he boards Air Force One before departing Miami International Airport, in Miami, Florida on April 3.An adviser to US President Donald Trump said new sweeping tariff policies were not a scheme to sink the stock market, despite the president posting a video that claimed his trade war was part of a long-term strategy to force the Federal Reserve to slash interest rates.National Economic Council Director Kevin Hassett assured anchor George Stephanopoulos that the public won’t be facing economic instability during his appearance on ABC’s This Week on Sunday morning.Asked to address economists’ predictions of rising costs, Hassett told Stephanopoulos that while there might be “some in