President Donald Trump has declared that America's golden age "begins right now" as he was sworn back into office on a day that featured frigid weather, tech bros, a flurry of executive orders, and a surprise move by Joe Biden.

The trio of late night hosts also commented on Elon Musk's behavior ("a real-life comic book villain") and Big Tech's VIP presence at the Capitol: "Trump is selling the country to the highest bidder."

Photos from Donald and Melania Trump's New Year's Eve party at Mar-a-Lago. Elon Musk and son attended as did vice president-elect JD Vance.

Here are the best-dressed guests and their looks from the inauguration ceremony of Donald Trump, newly sworn in as the USA's 47th president.

The blossoming relationship between Trump and tech titan Elon Musk was on full display throughout Monday’s inauguration ceremonies.

About 20,000 Trump supporters have gathered at Capital One Arena in Washington Monday afternoon, where Trump and Vice President JD Vance are expected to address the crowd later in the day. Trump is also expected to sign several executive actions at the area during his on-stage appearance.

It was a “magical evening” for Lauren Sanchez on Sunday at a candlelight dinner for President-elect Donald Trump. She said so herself on Instagram ahead of accompanying her fiancé Jeff Bezos for the celebration held at the National Building Museum in Washington, DC.

Mr. Bruni is a contributing Opinion writer. Ms. McLean is a contributing editor at Vanity Fair and an author of “The Smartest Guys in the Room,” a book about the collapse of Enron. Mr. Silver is the author of “On the Edge: The Art of Risking Everything.”

During a speech at Capitol One Arena Monday following Donald Trump’s inauguration, Elon Musk appeared to deliver a Roman salute not once, but twice. The gesture is associated with Nazi Germany, and Musk was speaking triumphantly about Trump’s election victory when he made the salute.

For Sunday night’s Candlelight Dinner, Melania Trump showed some patriotism, wearing a black sequined Carolina Herrera long skirt, as well as a menswear-inspired Dolce & Gabbana tuxedo shirt, with a cummerbund and a floor-length tuxedo-style wool cape from Saint Laurent with duchess silk lapels.