Sen. Kyrsten Sinema, D-Ariz., unknowingly switched parties on Wednesday, at least briefly on CNN

Sinema made headlines for her speech on the Senate floor reaffirming her support of the filibuster, striking a fatal blow to the Democrat-backed voting bills she herself also supports but bucked her party's demands to carve an exception to the 60-vote threshold so the liberal overhaul of elections can be passed by a simple majority. 

LIBERAL PUNDITS MELT DOWN AFTER SINEMA DOUBLES DOWN ON FILIBUSTER SUPPORT: ‘RESIGN OR BE REMOVED FROM OFFICE’

During Wednesday night's installment of "Anderson Cooper: 360," an on-air graphic showed an "R" next to her name instead of a "D." 

Sen. Kyrsten Sinema, D-Ariz., incorrectly labeled as a Republican on "Anderson Cooper: 360."

Sen. Kyrsten Sinema, D-Ariz., incorrectly labeled as a Republican on "Anderson Cooper: 360." (CNN)

CNN anchor Anderson Cooper, however, did correctly identify her and West Virginia Sen. Joe Manchin as Democrats at the beginning of the segment while covering their meeting with President Biden. 

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Liberal critics have long accused Sinema and Manchin of being Republicans for not backing Biden's multi-trillion-dollar social spending bill.

CNN isn't the only media outlet to mistakenly switch the party of the two moderate-leaning senators. 

Earlier in January, Axios issued a correction in an article after it identified Manchin as a Republican.