Donald Trump's executive order will also impact foreign workers seeking H-2B, J-1 and L-1 visas also.President Trump is set to sign an executive order on Monday that will bar the entry of immigrant workers on a slate of employment-based visas including the H-1B for high-skilled workers till the end of the calendar year, senior administration officials said, claiming that the move will reallocate about 500,000 jobs to out-of-work Americans.