US southern border key issue ahead of midterm elections Immigration policy continues to feature heavily in the final campaigns of midterm candidates on both sides of the aisle. President Donald Trump has repeatedly blamed Democrats of allowing "criminals" into the country illegally and has ordered regular army troops to the US-Mexican border as a caravan of a few thousand impoverished migrants slowly marches toward the boundary. Meanwhile, Democrats, including former President Barack Obama, have accused Trump of "fear-mongering" and "political stunts". IMAGES from the US-Mexico border in San Elizario, Texas