White House Press Secretary Karine Jean-Pierre got in a tense exchange at Tuesday's daily press briefing when she was asked to defend a claim that illegal immigration had dropped 90 per cent. Fox News correspondent Peter Doocy put the question to her, on a day when she also shut down a reporter's question about why President Joe Biden hadn't acknowledged his seventh grandchild amid a Hunter Biden custody dispute. 'You said yesterday that when it comes to illegal migration, you've seen it come down by more than 90%. Where did that number come from?' Doocy asked her. He tried to...