Article continues below advertisementCNN Chief White House Correspondent Kaitlan Collins is a frequent foil of President Donald Trump and said she remains unfazed by him, adding that his latest criticism of her is no laughing - or smiling - matter.During an Oval Office press briefing on Tuesday, February 3, Trump lashed out at the intrepid Collins for her line of questioning on the Epstein files, scorching her for "not smiling."Collins asked the thin-skinned president what he would say to dead child trafficker Jeffrey Epstein's survivors - who feel they have not yet seen justice.