Technology candidates use for their own campaign websites.
In alphabetical order, by last name:
Hilary Clinton: ASP, IIS
Ted Cruz: wordpress, nginx
Marco Rubio: wordpress, apache & nginx
Bernie Sanders: wordpress, nginx
Donald Trump: php, nginx
http://builtwith.com/hilaryclinton.com
http://builtwith.com/tedcruz.org
http://builtwith.com/marcorubio.com
http://builtwith.com/berniesanders.com
http://builtwith.com/donaldjtrump.com