President Trump took a defiant victory lap in the House chamber on Tuesday night, using his address to a joint session of Congress to promote the flurry of drastic changes to domestic and foreign policy that his administration has made in just the first six weeks.

Delivering the longest address to Congress in modern presidential history, Mr. Trump reprised many of the themes that animated his campaign for president and spent little time unveiling new policies, as presidents traditionally have done on these occasions. He spoke for roughly one hour 40 minutes.

“We have accomplished more in 43 days than most administrations accomplish in four years or eight years — and we are just getting started,” he said.

Democrats lodged protests throughout the evening, with one representative getting kicked out and others holding signs in silent opposition. But Mr. Trump argued that it was the Democrats who left him a country besieged by crises and that his administration was working to clean them up.

Here are six takeaways from Mr. Trump’s first address to a joint session of Congress in his second term.