VOA慢速英语:Congressman Steps Down from Trump-Russian Investigation

classified - adj. information that is supposed to be secret

vindicate - v. to show someone who has been criticized or doubted is correct

wiretap - v. a device that allows someone to secretly listen to phone conversations

replace - v. to take over a job from another person

hack - v. to secretly get access to the files on a computer or network in order to get information

sanctions - n. an action that is taken or an order that is given to force a country to obey international laws by limiting or stopping trade with that country

particularly - adv. more than usually