Investigators in both House and Senate were stunned late Friday when, receiving a batch of newly-released texts between FBI officials Peter Strzok and Lisa Page, they also received notice from the bureau that the FBI "failed to preserve" Strzok-Page messages from December 14, 2016 through May 17, 2017. Given the amount of texting that went on between Strzok and Page, who were having an extramarital affair, that probably meant thousands of missing documents. A number of critical events in the Trump-Russia affair occurred between December 2016 and May 2017, including: Conversations between Trump national security adviser Michael Flynn and Russian...