Action speak louder than tweets.
Senators and Representatives don't spend all their time in Washington; they also head home to visit with their families and constituents. This happens frequently -- in fact, Congress is only in D.C. about 137 days per year. When they aren't in D.C., they're at home - and you can go visit them! You can either schedule a meeting with your elected leaders in person or engage them in a public event, like a town hall meeting or fundraising event.
Congressional representatives care about what their constituents have to say; after all, constituents are their bosses! And in-district meetings are particularly important. Every in-person meeting has an exponentially bigger impact than a letter or email. It engages them in a way no other form of communication can.
