Business has sought temporary worker programs in a quest for a cheaper workforce, but labor has opposed the programs because of concerns over working conditions and the effect on jobs and wages for U.S. workers. The issue helped sink the last major attempt at immigration overhaul in 2007, which the AFL-CIO opposed partly because of temporary worker provisions, and the flare-up earlier this month sparked concerns that the same thing would happen this time around. Agreement between the two traditional foes is one of many indications that immigration reform has its best chance in years in Congress this year.After apparent miscommunications earlier this month between the AFL-CIO and the Chamber of Commerce on the wage issue, the deal resolves it in a way both sides are comfortable with, officials said. Workers would earn actual wages paid to American workers or the prevailing wages for the industry they're working in, whichever is higher. The Labor Department would determine prevailing wage based on customary rates in specific localities, so that it would vary from city to city. There also had been disagreement on how to handle the construction industry, which unions argue is different from other industries in the new program because it can be more seasonal in nature and includes a number of higher-skilled trades. The official said the resolution will cap at 15,000 a year the number of visas that can be sought by the construction industry. Schumer called White House chief of staff Denis McDonough on Saturday to inform him of the deal, the person with knowledge of the talks said. The three principals in the talks â¿¿ Trumka, Donohue and Schumer â¿¿ agreed they should meet for dinner soon to celebrate, the person said. However, in a sign of the delicate and uncertain negotiations still ahead, Rubio sent a letter Saturday to Judiciary Committee Chairman Patrick Leahy, D-Vt., calling for a deliberate hearing process on the new legislation and cautioning against a "rush to legislate." Rubio and a number of other Republicans are striking a tricky balance as they simultaneously court conservative and Hispanic voters on the immigration issue.