In May, the president pulled his nomination of billionaire Jared Isaacman for the position days before his Senate vote.

U.S. Transportation Secretary Sean Duffy on Wednesday will detail the Trump administration's plans to overhaul the aging U.S.

U.S. Transportation Secretary Sean Duffy will dually serve as acting NASA administrator, President Donald Trump announced ...

President Donald Trump appointed Transportation Secretary Sean Duffy as NASA’s interim administrator. Trump had been ...

Six weeks after he terminated the nomination of Jared Isaacman to become NASA administrator, President Trump moved on ...

At a time of turmoil and competing visions for the agency, NASA will be led by a Trump administration cabinet member.

President Trump announced Wednesday that Transportation Secretary Sean Duffy will temporarily lead the National Aeronautics ...

U.S. Transportation Secretary Sean Duffy urges state governors to focus on improving road safety, particularly on non-freeway ...