A new $100,000 fee for H-1B visas goes into effect Sunday, but it will not be applied to existing holders of valid visas re-entering the country, a White House official tells Axios.Why it matters: President Trump's executive order, as written, gave some lawyers the impression the fee would kick in immediately for existing holders — prompting panicked advice to clients to get back to the U.S. Saturday, or else. Catch up quick: Friday night, Trump signed an order requiring an H-1B holder, or their...