Republicans face one of the trickiest political problems they have faced as a party since Clinton pre-empted their program through triangulation and left them temporarily devoid of issues. As the number of illegal immigrants mounts in the United States, the demands of the party’s nativist constituency for tighter border controls and immigration enforcement threatens to put it at odds with America’s rapidly growing Hispanic population, dooming the GOP to possible minority status not just in California and New York but in Texas and Florida as well. The push-pull between Hispanic demands for respect and nativist concerns about job loss, crime, education costs and urban crowding, all exacerbated by illegal immigration, poses a huge problem for party leaders. The obvious answer to demands for limits on immigration is the border fence passed by the House and pending in the Senate. Slated to extend over 700 miles of the U.S.-Mexico border at a cost upwards of $2 billion, the barrier, coupled with increased enforcement manpower and effective employer sanctions, will likely give the United States a means to control population inflows. But what of the economic, moral, foreign-policy and political issues a fence will raise? Economically, Mexican illegal immigrants are not in search of welfare but come looking for work. That they find it is obvious. Otherwise how could they send $11 billion a year home to their families and why would they come in increasing numbers? Clearly the American economy needs their services. On a micro-economic level, they do jobs Americans don’t want at wages below what we would consider acceptable — and perhaps below those that are legal as well. On a macro level, their presence holds down labor costs and permits the Federal Reserve to take more chances with low interest rates than it could in an inflationary-wage market. The obvious answer to these concerns is a grand bargain that couples the strictest border defense with a generous guest-worker program, granting legal status to Mexican immigrants and regulating their numbers, working conditions, and wages — and assuring that they contribute to Social Security and other taxes.