Dating back to 2015, the private Instagram account of Lev Parnas, a Ukrainian-American indicted for illegal campaign donations, appears to show VIP access to President Trump and a close relationship with Rudy Giuliani. Subpoenas issued to people with ties to President Trump’s personal lawyer, Rudy Giuliani, indicate a broad federal investigation into possible money laundering, obstruction of justice and campaign-finance violations and show that prosecutors are probing Mr. Giuliani’s consulting businesses and other sources of income, according to people familiar withe the matter.