Businessman Donald Trump continues to lead in the polls as the media spotlight remains focused on his campaign. Trump has been especially outspoken on immigration but only recently has he outlined his plans in a formal policy paper available via his website.

The paper elaborates on "core principles" that Trump asserts will lead to "real immigration reform." Although the plan includes one verifiable savings and could also lead to possible but indeterminate additional welfare-related savings, the plan would also require $6.6 billion in spending increases per year, or a net of $32.7 billion over the next five years.

• Southern Border Wall: “There must be a wall across the southern border.”

Cost: $2.52 billion per year ($12.6 billion over five years)

Notes: According to reports, 650 miles of fencing have been constructed along the southern border, 350 miles of which is pedestrian fencing. In 2009, the Government Accountability Office (GAO) reported that vehicular fencing along the southwest border would cost about $1 million per mile on average while pedestrian fencing would cost about $3.9 million. The report also notes, "However, once contracts were awarded, the average per mile costs had increased to $6.5 million per mile for pedestrian fencing and $1.8 million per mile for vehicle fencing … the per mile costs increased over time due to various factors, such as property acquisition costs incurred for these miles that were not a factor for many of the previous miles and costs for labor and materials increased."

Read the full article at the National Taxpayers Union: What Would Donald Trump's Immigration Plan Cost?