Washington (CNN) Hillary Clinton will sit down for an interview with CNN's Alisyn Camerota that will air Tuesday just before President Barack Obama delivers his final State of the Union address.

The Democratic presidential front-runner, still furiously fending off a challenge from Vermont Sen. Bernie Sanders on her left flank, is trying to energize her own supporters -- and has increasingly focused on her electability against a Republican in recent days.

Excerpts from the interview will air at 7 p.m. on Tuesday on CNN's "Erin Burnett OutFront," and the full interview will air on Wednesday during "New Day."

She'll be in Iowa on Tuesday, where she and Sanders will cross paths at a forum in Des Moines on Monday night -- and where former President Bill Clinton just visited on Thursday.

Vice President Joe Biden will also sit for an interview, this one with CNN's Gloria Borger on the eve of the State of the Union.

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