Which President of the US never had a Gallup Poll job approval rating above 49% during his term in office?

The US President who never had a Gallup Poll job approval rating above 49%, during his entire 4 years in office, was Donald Trump. He is a guy who has been an American media personality and businessman who served as the 45th president of the US from January 2017 to January 2021.

The Gallup Poll was and is used as a simple, yet powerful way to measure the public's view of the US president's job performance at a particular point in time.

Gallup's methodology for conducting its poll isn't complex. Until 1989, Gallup conducted interviews using face-to-face interviews. Since 1989, Gallup has conducted all of its polls by telephone. In 2008, Gallup's national Random Digit Dialing (RDD) telephone samples included cellphone interviews for the first time, with most interviews still conducted on landline telephones. The proportion of cellphone interviews has since steadily increased according to executives at Gallup. In 2019, Gallup returned to its 1938-2008 practice of reporting job approval ratings from data obtained by making discrete, multiday surveys.

Donald Trump (b. June 1946 in New York, NY) was a real-estate developer and businessman before he became US president. In the early 21st century his private conglomerate, the Trump Organization, comprised some 500 companies involved in a wide range of businesses. He was the third president to be impeached and the only one to be impeached twice. He was acquittal twice by the US Senate. He lost in 2020 for re-election.