Donald Trump Jr., the president’s eldest son, took a stake last year in a startup whose co-chairman is a major Trump campaign fundraiser who has sought financial support from the federal government for his other business interests, according to records obtained by ProPublica. The fundraiser, Texas money manager Gentry Beach, and Trump Jr. attended college together, are godfather to one of each other’s sons and have collaborated on investments — and on the Trump presidential campaign. Since Trump’s election, Beach has attempted to obtain federal assistance for projects in Asia, the Caribbean and South America, and he has met or corresponded with top officials in the National Security Council, Interior Department and Overseas Private Investment Corporation. Beach and others at the startup, Eden Green Technology, have touted their connections to the first family to impress partners, suppliers and others, according to five current and former business associates. Richard Venn, an ear...