Adam Clayton Powell IV

When Rangel retired in 2016, Powell ran again for the House seat. He lost to state Senator Adriano Espaillat.

Powell lost to Charles Rangel in the 2010 primary for the 15th district.

In 2008, Powell was arrested and charged for allegedly driving while intoxicated (DWI) on the Henry Hudson Parkway in New York City. He was acquitted of driving while intoxicated and found guilty of the lesser charge of driving while impaired. This charge is considered a traffic violation rather than a criminal conviction. One juror commented, "the whole thing is we didn't think he was drunk."

Powell worked for the Federal Emergency Management Agency (FEMA). In 2001, he participated and was arrested in the Vieques protests, which demanded the departure of the U.S. Navy from that island.

Powell actually lost the Democratic primary vote by 34 votes to William (Bill) Del Toro in a seven-person field. Del Toro and his brother Assemblyman Angelo Del Toro, were powerful players in East Harlem politics for two decades with Angelo as a powerful Assembly committee chairman. Powell sued for a new election. His Campaign Manager Geoffrey L. Garfield, spent a month at the Board of Elections combing through every registered voter card (“buff card”) to ascertain whether non-Democrats voted in the primary. They found over 1,000 voters whom did not properly check the “party affiliation” box on the form. Del Toro sued to stop the effort by declaring “defective service” of legal documents to Del Toro’s home. Powell was successful in a hearing with an Elections Department Referee; on appeal the lower Supreme Court reversed the decision. Powell appealed to the state’s Appellate division where a five-judge panel ruled in Powell’s favor and mandated a Special Election the following week. Powell won 73-27 percent of the vote. (Source: Geoffrey L. Garfield, Campaign Manager) In 1994, Powell challenged Representative Charles B. Rangel for his seat in the United States House of Representatives, but lost. In 1997, he ran for Manhattan borough president, but lost to C. Virginia Fields.

When Powell ran for Congress in 1994, he raised $64,000, 10% of which came from residents of his state, while the remainder were donated by contributors from Miami and New Jersey, including $5000 from Free Cuba PAC, Inc., headed by leading Cuban-exile community figure Jorge Mas Canosa who made a $1000 personal donation to Powell.

Powell ran successfully for the New York City Council in 1991.

Powell married Andrea Dial, a former Ebony fashion fair model. They had a son, Adam Clayton Powell V, before divorcing in the mid-1990s.

In 1980, Powell moved to the mainland United States to study at Howard University in Washington, D.C.. He changed his surname by dropping his mother's surname "Diago". He then continued to use the name Adam Clayton Powell IV. This has caused confusion as his half-nephew, 8 years younger than he, was also named Adam Clayton Powell IV. He later earned a law degree from Fordham University School of Law in New York.

Adam Clayton "A.C." Powell IV (born Adam Clayton Powell Diago; in 1962) is an African American politician from the state of New York. He was a member of the New York State Assembly from 2001 to 2010. From 1992 to 1997, he served as New York City Council Member representing East Harlem and parts of the Upper West Side and the South Bronx. Beginning in 2001, Powell represented the 68th Assembly District, which includes parts of Harlem and East Harlem. He was defeated by Charles Rangel in the 2010 Democratic Primary for the seat of the 15th Congressional District.

Powell was born to civil rights leader and former congressman Adam Clayton Powell, Jr. and his third wife Yvette Diago in San Juan, Puerto Rico. He was named Adam Clayton Powell Diago, as is the Spanish naming custom of using the mother's surname as part of his official name. Powell's maternal grandfather Gonzalo Diago was a mayor of San Juan, Puerto Rico and served as such from 1941 to 1945. When his parents separated, Powell's mother was granted custody, and he was raised and educated in Puerto Rico.