Economists in the Agriculture Department's research branch say the Trump administration is retaliating against them for publishing reports that shed negative light on White House policies, spurring an exodus that included six of them quitting the department on a single day in late April. The Economic Research Service — a source of closely read reports on farm income and other topics that can shape federal policy, planting decisions and commodity markets — has run afoul of Agriculture Secretary Sonny Perdue with its findings on how farmers have been financially harmed by President Donald Trump's trade feuds, the Republican tax code rewrite and other sensitive issues, according to current and former agency employees.The reports highlight the continued decline under Trump’s watch in farm income, which has dropped about 50 percent since 2013. Rural voters were a crucial source of support for Trump in 2016, and analysts say even a small retreat in 2020 could jeopardize the president’s standing in several battleground states.