WASHINGTON, April 9 (Reuters) - Fox News said on Sunday it has reached a settlement with a Venezuelan businessman Majed Khalil, ending a defamation case in which Khalil said he was falsely accused on air of helping to rig the 2020 U.S. presidential election against Donald Trump. Khalil had filed a defamation suit against the news outlet and former host Lou Dobbs, arguing in filings that they had fabricated claims he and other Venezuelans were involved in "orchestrating a non-existent scheme to rig or fix the election" against the former Republican president. A short letter sent to U.S. District Judge...