(Photo and story from https://talkingpointsmemo.com/news/obama-standing-ovation-toronto)
Barack Obama was not the most popular president the country has seen. His overall average approval was 48%, hitting lows at 40% couple of times in his first and second terms. He came into office with a 67% approval and never quite hit that level again, coming closest in the final polling of his presidency when he reached 59% (these numbers are from the Gallup presidential approval center, other numbers may vary slightly). A notable difference between our current and former presidents is their willingness to go into mixed crowds.