Congress should curb the government’s ability to peer into your inbox. EVER SENT an embarrassing e-mail? Ever gotten one you’d rather that others not see? Read this editorial if you use Gmail. Or if you have a Dropbox account. Or if you back up any of your files to Google Drive, Apple’s iCloud or any other remote drive that you can’t hold in your hand. Though some argue that the Fourth Amendment overrides it, a federal statute allows law enforcement agents to view material on these and many other common electronic storage services without a warrant, as long as that material is at least 180 days old...