Brazil's Foreign Ministry said on Saturday it denied visas to two U.S. State Department officials who sought to travel to the South American nation next week, in the latest political barb between the two countries. A spokesperson for Brazil's foreign office said Barnes and Samson requested visas on July 20 and they were denied Friday. Sen. Bolsonaro and his brother, Eduardo, visited U.S. officials in Washington, including President Trump, in late May. Former Brazilian President Jair Bolsonaro has for years fed concerns about the country's electronic voting system, without providing any evidence for his claims. His son, Sen. Bolsonaro, has recently repeated some of these claims, although he steered clear of those on Saturday when his Liberal Party confirmed him as a presidential candidate in Sao Paulo.