Thank you for reaching out to us at Countable!
Representatives in Congress and the Senate screen electronic contacts to be from their Constituents - including the Leadership. As a result, the best way to contact a Representative other than your own is to contact them by Phone.
Here's links to the current leadership on Countable and their phone numbers:
House Speaker Paul Ryan - (202) 225-3031
Senate Majority Leader Mitch McConnell - 202-224-2541
Hope this helps! Please do not hesitate to contact us with any other questions you may have.