Nogales, Arizona (CNN) - Four members of the "Gang of Eight" toured the U-S-Mexican border at Nogales, Arizona Wednesday.
Republican Senators John McCain and Jeff Flake and Democratic Senators Charles Schumer and Michael Bennet took part in the tour.
They met with U-S Border Patrol agents, took a helicopter tour of the area and visited a port of entry.
The Gang of Eight is made up of four Democrats and four Republicans.
They're working through the Congressional recess to come up with a comprehensive immigration reform bill.
They're planning to introduce it in April.