This is it. Today Donald J. Trump, a real estate developer and reality TV host with no political experience and a bevy of alarming views, is being sworn in as the 45th president of the United States.

This seemed unthinkable just a few short months ago, but it’s reality, and we have to deal with it.

Advocates and activists I know were certainly disappointed and even angry after the election. But none of them has turned away from activism. If anything, they’re more fired up than ever.

Fired up certainly describes the situation at Americans United. We’ve seen a flurry  of activity since Nov. 8 as Trump has named a raft of reckless cabinet appointees, and we’ve geared up to respond to some of the things he promoted during the campaign, such as  a massive school voucher plan and repealing the law that curbs partisan politicking by houses of worship.

Donald Trump's presidency begins today -- but AU's fight to stop him from eroding the church-state wall is already well under way.

We’ll have our hands full for the next few years, and we can’t succeed without your help. So don’t despair. Get active! Here are some ideas for how to get involved:

Join Americans United or make a special donation today: If you’re not already supporting AU financially, now is a critical time for you to step forward. Your support will ensure that AU has the resources it needs for the fights ahead.

Get involved with an AU chapter: Local activism is a great way to make connections with other activists, build community and amplify your voice. Americans United has chapters all over the country. Find out if there’s one near you and jump in. If there’s not, explore the possibility of forming one.

Once you’re part of a chapter, you’ll be informed about AU events in your area featuring speakers, panel discussions, lobbying days and so on.

Stay informed: Information is crucial. You can’t oppose bad Trump proposals if you don’t know about them. AU has you covered there. Sign up for our e-mail updates. AU’s Facebook page, Twitter feed and Instagram account are great places to get real-time information and resources. We’ll keep you on top of the latest developments and let you know about actions you can take to defend church-state separation.

AU’s Protect Thy Neighbor site has a great tool you can use to track legislation in Congress and in the states that threatens religious freedom. Gather and share this information.

Take action: Use our action center to contact your elected officials. Use social media to tell your friends about the issues, share AU’s graphics and encourage others to take action. And don’t forget about newspapers. Letters to the editor and guest opinion columns remain excellent ways to reach people.

Find your AU niche: Are you a student? Great – AU needs your voice. Check out Students for Church-State Separation here. Are you a member of the clergy? AU’s network of religious leaders, Faith Leaders United, wants to hear from you. But remember, no matter what your gender, sexual orientation, political affiliation, race or religious or non-religious belief, Americans United welcomes you. We’ve always been a diverse group; it’s one of our greatest strengths.

Disengage? Give up? Not on your life! Rest assured that Americans United is already in the thick of the fight and intends to stay there. Join us. We need you!

P.S. Want to get started right away? The Women’s March on Washington this Saturday is a great place to start. Americans United is a partner for the event and will have a contingent marching in D.C. If you can’t make it to the nation’s capital, remember, there are sister marches taking place all over the nation.