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Walker drops out of 2016 race, while Fiorina is on the rise The state of the 2016 campaign after Scott Walker drops out and Carly Fiorina rises. Washington Post national political reporter Robert Costa joins CBSN to discuss.

The state of the 2016 campaign after Scott Walker drops out and Carly Fiorina rises. Washington Post national political reporter Robert Costa joins CBSN to discuss.

Walker drops out of 2016 race, while Fiorina is on the rise

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Wisconsin Governor Scott Walker has dropped out of the 2016 presidential race. CBS News chief White House correspondent Major Garrett has more for CBSN.

Scott Walker drops out of presidential race

The GOP primary campaign is shaken up as former HP CEO Carly Fiorina surges in the polls. Vox Chief Political Correspondent Jon Allen joins CBSN with analysis.

Carly Fiorina surging in the polls

GOP presidential candidate Carly Fiorina joins CBSN to discuss her performance and the many confrontational moments at the second GOP primary debate.

Carly Fiorina reacts to second GOP debate

Wis. Gov. Scott Walker is preparing to suspend his 2016 presidential primary race. CBS News senior political editor Steve Chaggaris spoke to CBSN about the upcoming announcement.

Scott Walker to drop out of 2016 Republican primary

GOP presidential candidate Carly Fiorina delivers strongly-worded remarks and takes questions at Red State conference. CBS News Senior Political Editor Steve Chaggaris joins CBSN with analysis.

Fiorina takes on Clinton, status quo in Red State conference remarks

Carly Fiorina, a formal rival of Donald Trump for the 2016 Republican presidential nomination, plans to cast her vote for Democrat Joe Biden in November...