Due to projected cold weather in Washington, D.C., his inauguration ceremony was held indoors -- the first time in four decades.
Trump took his oath of office administered by Chief Justice John Roberts. Chief Justice usually administers the presidential oath of office, a tradition that has been followed since the first inauguration.
Trump said in his inauguration speech that American decline ends and "the golden Age of America begins right now."
In his speech, Trump promised to sign "a series of historic executive orders," including declaring a national emergency at the southern border, enhancing oil and gas production, revoking electric vehicle mandate. He also promised to immediately begin the overhaul of the trade system and "tariff and tax foreign countries."
