This is the letter I received back from my representative:
Dear David,

Thank you for writing me to share your support for the Johnson Amendment. I appreciate hearing from you on this important issue.

As you may know, the Johnson Amendment, a provision in the tax code that was passed in 1954, prohibits tax-exempt organizations, including churches and other houses of worship, from participating in political activities. The rationale behind the law is that the government should not subsidize political activity.

Campaign finance laws should be designed to shield our political system from the corrupting influence of money. As we have seen in the wake of the Supreme Court's decision in Citizens United, allowing unlimited spending by corporations and super PACs in our elections is deeply destructive and undermines Americans’ faith in our political system. I believe this constitutes a fundamental attack on "government of the people, by the people and for the people," as President Lincoln so eloquently described American democracy.

The Johnson Amendment provides an important safeguard to prevent non-profit organizations from exploiting their tax-exempt status to engage in political activity. If it were repealed, even more money could flow into the electoral process, further undermining our democracy.

I will continue working with my colleagues to stop special interests from unduly influencing our elections and I will keep fighting to return control of our democratic process to ordinary citizens.

Thank you, again, for sharing your thoughts with me on this issue. I hope you will continue to write me about issues that are most important to you.

All my best,

Jeffrey A. Merkley
United States Senator

I don't know why self-identified conservatives on this site won't admit that EVERY challenge to separation of church and state comes from the GOP! This is from the 115th Congress but it doesn't seem to have completely died yet.
[congress.gov]