"Only one candidate in the General Election came to speak to you, and that candidate is now the President of the United States, standing before you again," the President said, eagerly reminding the crowd that few people gave him a chance to win last year.
"And remember they said, “There is no path to 270.” For months I was hearing that," Mr. Trump added, as he vowed to protect the Second Amendment during his time in office.
The President's choice to go to Harrisburg - the state capital - is an interesting one, as Dauphin County was one of only 11 counties to vote for Hillary Clinton in November, going 49 to 46 percent for the Democrats.
Mr. Trump won the Keystone State by just 44,000 votes, as his wins in Pennsylvania, Ohio, Michigan and Wisconsin were a linchpin for his overall victory.
"It was a great evening, one that a lot people will never forget," Mr. Trump said Friday. "Not going to forget that evening."
The President's decision to hold a Saturday evening rally in Pennsylvania is also notable for what he will leave behind in Washington, D.C. - the White House Correspondent's Dinner - which Mr. Trump and his top aides decided not to attend.