Here's why you should call, not email, your legislators

But a large volume of calls on an issue could bring an office to a halt, sometimes spurring the legislator to put out a statement on his or her position, Ms. Ellsworth said. She recommended the tactic in a series of tweets shared thousands of times.

“It brings a legislative issue right to the top of the mind of a member,” she said. “It makes it impossible to ignore for the whole staff. You don’t get a whole lot else done.”
When her branch in Utah received a lot of calls, she contacted the Washington office and coordinated the messaging, involving the communications director, the legislative director or the chief of staff, Ms. Ellsworth said.

While scripts found on the internet can be useful for people uncomfortable talking on the phone, she suggested making the phone calls as personal as possible. In some cases, if she was moved by a call, she would pass on the comments to her district director, she said.