WATCH The key moments from Hill and Holmes’ Trump Impeachment Hearing

On the fifth day of public impeachment hearings, Fiona Hill, the White House’s former top Russia adviser, and David Holmes, a top staffer at the U.S. Embassy in Ukraine, told the House Intelligence Committee about their knowledge of events related to President Donald Trump’s communications with President Volodymyr Zelensky and the hold placed on vital military aid. Hill urged the lawmakers not to “let domestic politics stop us from defending ourselves from the foreign powers that truly wish us harm.” And she described her interactions with U.S. Ambassador to the European Union Gordon Sondland, whose suggestion in testimony Wednesday that he didn’t associate the Ukrainian company Burisma with Hunter Biden was “not credible,” she said. Holmes, meanwhile, described overhearing a cellphone call between Sondland and Trump, in which he says he heard the president ask about the “investigations” in relation to Ukraine.