The PCCC invests in advocacy campaigns and progressive candidates running for office in the United States, at both the national and local level.

[10][11][12] The PCCC claims to have nearly one million members and former MSNBC host Ed Schultz described it in 2012 as the "top progressive group in the country.

"[13] The PCCC is a major subject of The MoveOn Effect, a book published by the Oxford University Press authored by David Karpf.

[14] During the lead-up to the 2016 elections, the PCCC did not join other progressive groups in urging Warren to challenge Hillary Clinton for the Democratic nomination for president.

[21][26] In her book, A Fighting Chance, Senator Warren writes that the "Progressive Change Campaign Committee signed on early with the petition encouraging me to run, and they stayed with me every day right through the election.

[31] During the lead-up to the 2016 elections, many progressive groups began campaigns urging Warren to challenge Hillary Clinton for the Democratic nomination for president, but the PCCC was notably absent.

[32] In 2010, Arkansas Lieutenant Governor Bill Halter challenged the moderate Democratic incumbent United States Senator Blanche Lincoln in the primary.

The P Street Project victories include working with Representative Carolyn Maloney to organize a letter to President Obama asking him to nominate Elizabeth Warren for the Consumer Financial Protection Bureau.

Representative Jared Polis said that the P Street Project could generate a tremendous amount of energy from the public and progressive members of Congress as well as provide resources and political cover [clarification needed] for liberal lawmakers.

[38] Other P Street successes include working with Rep. Marcy Kaptur to deliver over 140,000 petitions to the Department of Justice demanding a criminal investigation into Goldman Sachs for their involvement in the 2007–2008 financial crisis.

[39] The PCCC, through P Street, worked with Congressional Progressive Caucus Co-Chair Raul Grijalva to defend Social Security and Medicare during the debt ceiling crisis in 2011.

In 2010, the group launched GoogleDontBeEvil.com and helped deliver over 300,000 signatures to Google’s corporate headquarters, calling on them to honor their company motto, "Don’t be evil" as well as end their secret deal with Verizon to kill Net Neutrality.

Over 100,000 of the organization's members signed a petition telling U.S. Federal Communications Commission Chairman Julius Genachowski to deliver on real Net Neutrality protections – instead of letting corporations write the rule.

[52] The PCCC organized a massive campaign against the Stop Online Piracy Act bill the Senate was prepared to vote on.

[53] In January 2011, the PCCC delivered over 50,000 thank you notes written by its members to Senator Harry Reid after he took a stand against alleged proposals to cut Social Security benefits.

[61] By July 2012, other corporations to stop funding ALEC include Amazon, Best Buy, Coca-Cola, CVS, Dell Computers, Hewlett-Packard, Kraft foods, MillerCoors, and Wal-Mart.

Republican Jase Bolger, then serving as Speaker of the Michigan House stated that by referencing "vagina", and then saying "no means no", Brown was making a reference to rape which was inappropriate for legislative setting.

The PCCC promptly organized a campaign demanding Bolger and Stamas apologize to Brown and Barbara Byrum, who was also not allowed to speak that day.