The inauguration marks the official transfer of presidential power, with the executive branch changing hands from the Biden administration to the Trump administration. The 20th Amendment states that a president's four-year term ends at noon on Jan. 20, and the president-elect is sworn in shortly after.

Clinton was caught on camera snickering as Trump vowed to change "the name of the Gulf of Mexico to the Gulf of America."

Donald Trump's granddaughter, Kai Trump, continues to make waves on social media. Kai Trump, the high school senior granddaughter of the President of the United States, has developed a big-time following on social media.

President Donald Trump’s oldest grandchild Kai Trump gave a behind-the-scenes look at his historic Inauguration Day festivities that capped off the “experience of a lifetime.” “Today my grandpa becomes president of the United States again — let’s go!