A coalition of more than 70 liberal groups coordinated to plan nationwide protests demanding President Donald Trump release his tax returns.

The April 15 protests drew thousands of people in Washington, D.C. ‘Local protests' took place in 44 states, with international protests in Germany, Japan, New Zealand, and the United Kingdom.

The protests were organized through a website called TaxMarch.org. The site claims the demonstrations were the result of ordinary Americans, community organizers, advocates, and "people from all walks of life and all backgrounds" holding Trump, his administration, and Congress accountable.

The Tax March's executive committee includes individuals who have already been involved with a number of Trump protests around the country.

Anna Chu, who sits on the Tax March's executive committee, is the vice president for income security and education at the National Women's Law Center, a D.C.-based advocacy group. Chu previously worked for the Center for American Progress Action Fund, the advocacy arm of a liberal think tank founded by Hillary Clinton's former campaign manager John Podesta. Before that, Chu was a policy director for the Democratic Senatorial Campaign Committee and a policy adviser for the House Democratic Caucus.

Ezra Levin, a cofounder and executive director of Indivisible, a D.C-based group that works with activists to resist the Trump agenda at the state level, also sits on the group's executive committee.

Indivisible is closely connected to powerhouse liberal groups that have mapped out protests against Trump and Republican politicians.

The group published a guide for activists that is promoted by other liberal groups, including the Town Hall Project, the "organizing hub" of town hall protests against Republican politicians. The Town Hall Project recently announced a partnership for anti-Trump events with the Center for American Progress Action Fund. The Town Hall Project uses an online organizing platform from the Action Network, a group located at the same address as other groups involved in the anti-Trump Tax Day protests such as Color of Change, a union organizing group.

More than 70 progressive groups were involved in the Tax Day protests, including Media Matters for America, an organization run by longtime Clinton ally David Brock, and Demos, a George Soros-funded group chaired by the daughter of Sen. Elizabeth Warren (D., Mass.).

The progressive groups that took part in the Tax Day protests are listed below.

MoveOn.org

Stand Up America

Working Families

A Union of Professionals

American for Tax Fairness

CPD Action

CREDO

Indivisible

Our Revolution

32BJ SEIU

Action Group Network

AVAAZ

Change.org

Color of Change

CWA

Demos

National Domestic Workers Alliance

National Education Association (NEA)

National Low Income Housing Coalition

Public Citizen

Restaurant Opportunities Centers United

RISE Stronger

#AllofUs

Alliance for Democracy

American Family Voices

Center for American Progress (CAP) Action Fund

Center for Economic and Social Rights Coalition of Human Needs

Citizens for Responsibility and Ethics in Washington (CREW)

Coalition of Human Needs

Coming Clean

Common Cause

Courage Campaign

Daily Kos

Demand Universal Healthcare

Demlist

Democracy Spring

Economic Opportunity Institute

Economic Policy Institute

Endangered Species Coalition

Every Voice

Fix Democracy First!

Food & Water Watch

Free Speech for People

Generation Progress

Iowa Citizens for Community Improvement

Jobs With Justice

Main Street Alliance

Media Matters for America

Moms Rising

Money Out Voters In

National Partnership for Women and Families

NELP Action

Other 98

Patriotic Millionaires

People For The American Way

People's Action

ProgressNow

Project Vote

Resource Generation

Rock the Vote

Roots Action

Social Security Works

State Innovation Exchange

Sunlight Foundation

Take On Wall Street

UltraViolet

United For a Fair Economy

United For Homes

UniteWomen.org

Urban Citizens for Social Justice

Women's International League for Peace and Freedom U.S. Section

Workmen's Circle

The Tax March group did not return requests for comment by press time.