A senior Justice Department prosecutor in Robert Mueller’s Special Counsel office held a meeting with Associated Press journalists last spring to discuss an investigation into Paul Manafort’s financial record, a day before the wire service published a major expose disclosing alleged money laundering made by the former and now embattled Trump campaign chairman. Federal prosecutor Andrew Weissmann, now a senior attorney in the special counsel’s office, met with AP journalists on April 11 after reporters informed him of their own investigation into Manafort’s dealings with Ukrainian officials. The reporters had reached out to Weissman on a different story earlier in...