CBS News has signed former Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE 2016 campaign manager Robby Mook and former 2016 Marco Rubio Marco Antonio RubioGOP lawmakers distance themselves from Trump comments on transfer of power McConnell pushes back on Trump: 'There will be an orderly transition' Graham vows GOP will accept election results after Trump comments MORE campaign manager Terry Sullivan as contributors, according to a Thursday announcement by the network.





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Mook "is an experienced political strategist who brings vast insight and knowledge into American politics," CBS said in a statement announcing the hires, while Sullivan is "a seasoned strategist with more than two decades of experience in politics" who has "played a senior role in more than 100 campaigns."CBS News has undergone several changes in the past year. Former "CBS This Morning" co-host Norah O'Donnell replaced Jeff Glor as "CBS Evening News" anchor, and Susan Zirinsky, a former "48 Hours" executive producer, took the helm as CBS News president, replacing David Rhodes.Zirinsky also signed "CBS This Morning" anchorto a new contract earlier this year.

The signings of Mook and Sullivan come as all major broadcast news organizations continue to add talent and resources to their respective rosters ahead of the 2020 presidential election.