HOUSTON Wisconsin Gov. Scott Walker made his presidential pitch in Texas on Saturday night, touting his fighting spirit and Midwestern thriftiness before a crowd of Harris County Republicans who will have no shortage of choices in 2016. Walker, who has emerged as an early frontrunner for the GOP's nomination, cited his experience battling labor unions and saving taxpayers' money in Wisconsin as a template for a nation he said is on a worrisome path under President Barack Obama.