President Barack Obama has declared that the worst day of his four year presidency was the day of the Sandy Hook Elementary School shooting earlier this month. While speaking on NBC’s “Meet the Press,” the president expressed his desire to strengthen gun laws and the long term impact the eve t had on him.

“I think anybody who was up in Newtown, who talked to the parents, who talked to the families, understands that something fundamental in America has to change,” Obama said during Sunday’s program. “All of us have to do some soul searching, including me as president, that we allow a situation in which 20 precious small children are getting gunned down in a classroom.”