MEXICO CITY - As the United States fortifies its border with Mexico, Canadian companies are reaching out to immigrants who are frustrated by U.S. restrictions and tempted by dreams of a better life in Canada.

The Canadian government has been relaxing its immigration rules in an effort to attract students and skilled workers from all over the world. That, and the push by companies promising jobs and visas, is attracting Mexican professionals turned off by the Minuteman Project, new border walls, tougher U.S. entry requirements and laws like Proposition 200 in Arizona.

"Live in Canada!" says a Mexico City newspaper ad placed by a Canadian labor recruiter, as a photo of the Toronto skyline beckons. "Voted the No. 1 country in the world for living four years in a row," an immigration counseling company boasts on its Web site. advertisement

"Canada has its arms open to immigrants, and the United States has its arms closed. It's as simple as that," accountant Marcos Ramírez Posadas said as he stood in line with other visa applicants outside the Canadian Embassy in Mexico City.

The reason, immigration experts say, is that Canada needs more people...