NOGALES, Ariz. — A group of influential U.S. senators shaping details of an immigration reform package say they expect to make the legislation public by their April 8 deadline amid renewed negotiations between union workers and business groups over visas for low-skilled workers.

The negotiations were left in limbo Friday as Congress went into recess, but the senators say both sides had signaled they were open to compromise and were finalizing details on Wednesday.

The reassurances came after Republican Sens. John McCain and Jeff Flake of Arizona toured the U.S.-Mexico border in Arizona Wednesday with Democratic Sens. Chuck Schumer of New York and Michael Bennet of Colorado.

Schumer said his first tour of the porous border reassured him that more technology is needed to keep out drug traffickers and illegal immigrants.