The New Jersey Senator and former National Intelligence Director James Clapper were the latest presumed targets in the string of pipe bombs that have been sent to prominent critics of President Trump. Our J.D. Durkin is at the post office in Opa-Locka, Fla., from which the packages are believed to have been sent. Plus markets were poised for a sharp selloff after Amazon, Alphabet, and Snap all posted disappointing revenue for the latest quarter.