<prompt> Translate the following text to EnglishMfano wa mti wa barua pepe ni mti wa barua pepe wa kitaifa ambao unasaidia watu wa Iowa kuwasiliana na marafiki zao katika eneo la Ames kama wafuasi wa Forbes.  <response>: He set up a national e-mail tree designed to get people to send their friends in Iowa to Ames as Forbes supporters. 