The best markets for immigration lawyers are where there’s a lot of illegal immigration, according to the American Immigration Lawyers Association. The number one country is Mexico, which accounts for about 70% of all U.S.-bound migrants who come through the southern border. AILA claims that 3 out of 4 Mexican immigrants hire an attorney before they seek legal status in America. Meanwhile, Central Americans are not as well represented among hiring attorneys, but still make up 28% of new hires by U.S.-based attorneys last year. It may be more crowded at the top than it used to be because Mexico has stepped up its policing effort along their side of the border and Trump is making life tougher on would-be migrants trying to sneak into America illegally across our borders with Canada and Mexico now included in his travel ban list..