"You see congressional approval ratings at 10 percent, 9, 13 percent, whatever. First of all — that's too high," he said. "It's impossible to convey the dysfunction of Washington, D.C."
Johnson spoke to a packed kickoff luncheon for the three-day Faith and Freedom Conference, hosted by the socially conservative Faith and Freedom Coalition.
Only 10 percent of Americans polled in the most recent Gallup survey said they have confidence in Congress, the lowest level on record and a number that puts Congress last in a list of 16 public institutions in terms of public confidence.
Congressional approval was down to 9 percent among Republicans in April, when only 13 percent of Americans overall approved of the legislative body.
Johnson added that what surprised him about the approval rating is the fact that "at least a majority [of Americans] continue to elect politicians that are dedicated to growing this place," despite dissatisfaction with the government.
Johnson joined fellow GOP Sens. Marco Rubio (Fla.), Rand Paul (Ky.) and Mike Lee (Utah) in speaking at the luncheon on Thursday.