Whenever the party that controls the White House does not also control Capitol Hill, political pundits worry that there will be "gridlock" in Washington, so that the government cannot solve the nation's problems.
Almost never is that fear based on what actually happens when there is divided government, compared to what happens when one party has a monopoly of both legislative and executive branches.
The last time the federal government had a budget surplus, instead of its usual deficits, there was divided government. That was when the Republicans controlled the House of Representatives, where all spending bills originate, and Bill Clinton was in the White House. The media called it "the Clinton surplus."