A decision by the Trump administration to delay and possibly rescind an Obama-era rule could cause the U.S. to fall behind other countries in attracting immigrant entrepreneurs who bring investments and create jobs, experts say. The so-called International Entrepreneur Rule that the Obama administration introduced in August 2016 aimed to grant parole visas for up to five years to qualified immigrant entrepreneurs. The rule was set to take effect on July 17, but a week before that, the Department of Homeland Security (DHS), which oversees the program, announced that its effective date has been delayed until March 14, 2018. That move follows a memo the Trump administration issued in January that froze all new regulations pending reviews.…