Trump joined federal and local leaders on Wednesday morning for a ceremonial groundbreaking at the 115-year-old building. He hopes its $200 million transformation into a Trump International Hotel will be complete by late 2016.
The Old Post Office is on Pennsylvania Avenue between the White House and the Capitol. Its 315-foot observation tower is the third-tallest structure in the District of Columbia.
Trump did not say whether building a hotel near the White House would rekindle his presidential ambitions, but he did say it shows he can create jobs and get things done, which is "what the country needs."