"Raja will bring to Congress a tireless work ethic and deep experience in the public and private sectors," Pelosi, who is leader of the Democratic Party in the US House of Representatives, said.
"These qualities will enable him to pursue our common goal of fighting for progressive causes and strengthening and growing our middle class," she said in a recent statement.
"I strongly endorse Raja Krishnamoorthi because he is a true progressive and the best candidate to represent the working families in Chicago's Northwest suburbs," Pelosi had said.
Attorney and entrepreneur, Raja has also been endorsed by David Axelrod, former senior advisor to President Obama. In total, his campaign is supported by over 100 local and national leaders and organisations.
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His immediate challenge is to get through the March 15 primary contest before the general election.
Krishnamoorthi previously was the policy director and a senior advisor for Barack Obama's 2004 US Senate campaign, and also served as an advisor to Obama's 2008 Presidential campaign.
Born in New Delhi on July 19, 1973, his parents immigrated to Buffalo, New York when he was three months old.
Krishnamurthi currently serves as president of Sivananthan Labs and Episolar, Inc, small businesses that develop and sell products in the national security and renewable energy industries.
He is a co-founder of InSPIRE, a non-profit organisation that provides training to Illinois students and veterans in solar technology, and was formerly Vice-Chairman of the Illinois Innovation Council, which promotes innovative technologies that support economic growth and job creation.