Sen. Kamala Harris (D-Calif.) said Sunday that the Unites States is potentially facing a constitutional crisis,echoing comments this week from House Speaker Nancy Pelosi. “A constitutional crisis is generally when the system we set up with checks and balances, when each of the independent co-equal branches of government, fails to perform its duties and I think we’re seeing the breakdown of responsibilities,” she said in an interview with Jake Tapper on CNN’s State of the Union, pointing to the lack of cooperation from Attorney General William Barr and the White House with Congress. “Now being a member of the US Congress and Senate, I’m seeing up close where there is a failure to respect the significance of Congress’ duty to preform a role of oversight over the administration, over the agencies,” the presidential hopeful told Tapper.