President Donald Trump is planning to sign executive orders on Wednesday enabling construction of his proposed border wall along the U.S.-Mexico border and targeting cities where local leaders refuse to hand over illegal immigrants for deportation, part of a multiday rollout of his long-promised crackdown on illegal immigration, officials familiar with the decision said Tuesday. The moves represent Trump’s first effort to deliver on perhaps the signature issue that drove his presidential campaign: his belief that illegal immigration is out of control and threatening the country’s safety and security.