Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) Sen. Tim Kaine on Thursday called President Donald Trump's reportedly contentious phone calls with US allies Australia and Mexico "foolish." In an interview with Chris Cuomo on CNN's "New Day," Kaine criticized Trump after reports emerged of his heated exchanges with Australian Prime Minister Malcolm Turnbull and Mexican President Enrique Peña Nieto. "To have a contentious conversation and name-call a country or the Prime minister of a country that's one of our greatest allies in Asia is foolish," said the Democratic senator from Virginia, who was Hillary Clinton's running mate in 2016. "To suggest to the President of Mexico we may have to send US troops into Mexico is foolish. Some of the statements that the President is making about Iraq and Iran are foolish."Senator slams Trump after reports of heated phone calls with Australia and Mexico"He's doing kind of amateur-hour stuff," ex-vice presidential nominee says 
 Question:... _ is making Iran's case for them every day," he said.

Donald Trump