A political commentator isn’t surprised that Donald Trump is making good on his promise to build a border wall – between the U-S and Mexico. Allan Warnke says it was one of Trump’s main pledges during the U-S election campaign. Warnke believes that building the wall is part of Trump’s plan to re-negotiate the North American Free rade Agreement. Mexico’s president has cancelled a trip to Washington to meet with Trump amid tensions over the border wall.