The U.S. Secret Service does not protect Senators and their families. The Secret Service only protects the Presidents, former Presidents, presidential candidates, and visiting heads of state.
While going through the files on the computer at Megan's desk, Agent Hickley describes GIFs to Dr. Cross as being made up of billions of ones and zeros. In fact, even just one billion binary bits (ones and zeros) would be over 100 megabytes - at least a hundred times the size of typical GIF images.
The kidnapper tells Cross to run from the Watergate to 6th and Pennsylvania Avenue in 14 minutes, a distance of 2.1 miles. Then the kidnapper instructs him to double-back to 12th and Madison in 12 minutes (another .6 miles). The pay phone at 12th and Madison does not exist, that address is in the middle of the National Mall. The kidnapper then instructs Cross to get to Union Station in 4 minutes which is another 1.5 miles. First, that last leg of the run is ridiculous. Secondly, that is a total of 4.2 miles of running 30 minutes-not a bad workout in a full suit, trench coat, and dress shoes.