https://www.foxnews.com/politics/ted-cruz-bidens-trump-senate-impeachment-trialSen. Ted Cruz, R-TX., said Monday that "additional witnesses are not necessary– even in light of revelations from President Trumps former national security advisor John Bolton in a leaked manuscript of an upcoming book that claims Trump explicitly linked a hold on military aid to Ukraine to an investigation of Joe and Hunter Biden– and instead insisted that the Senate call Hunter Biden to testify.