All of them could soon be targeted by pro-Trump political action groups trying to unseat Democrats in the states Trump won in the 2016 presidential election.
A handful of swing vote senators will get to decide whether Trump's nominee — likely a young conservative — will make it on the Supreme Court.
Collins and Murkowski will decide whether to support Trump's choice partly based on where the judge stands on Roe v. Wade.
The GOP game plan for selecting the next member of the Supreme Court was ready to go even before longtime Justice Anthony Kennedy made his retirement announcement.
The political network funded by billionaire Charles Koch is planning to release attack ads targeting seven senators for voting against President Trump's $15.4 billion spending cuts package.
Trump aims to help GOP Rep. Marsha Blackburn, who's running in a tight race against Democrat Phil Bredesen.
Haspel gets confirmed despite concerns about her role at the CIA when it used tactics widely considered torture.
Trump's CIA pick Gina Haspel writes that the brutal interrogation program "is not one the CIA should have undertaken."
President Donald Trump warned at a rally on Thursday that Democrats would disrupt the economic progress of his administration.
Rep. Robert Pittenger lost a primary challenge, while Reps. Todd Rokita, Luke Messer and Evan Jenkins lost Senate primaries.
Braun will try to take down Sen. Joe Donnelly, one of the most vulnerable Democrats in the chamber.
In West Virginia, Indiana and Ohio, Republicans will choose nominees who will challenge Democratic Senate incumbents.
Rank-and-file voters who responded to Trump's gut-level appeals are considering new primary choices in a GOP under the president's control.
On Tuesday, West Virginia will join Indiana, North Carolina, and Ohio in hosting primary elections in states Trump carried in 2016.
GOP leaders are hoping Don Blankenship will not win the West Virginia Republican Senate primary, as he may hurt their chances of beating Democrat Joe Manchin.
Three Republican Indiana Senate candidates have elbowed their way toward an election that will determine who faces Sen. Joe Donnelly in November.
Trump lamented that the 51 seats Republicans currently hold in the Senate are "not really a majority."
Manchin and Donnelly are the second and third Senate Democrats to announce their support for Pompeo, joining Heidi Heitkamp.
Trump's decision to reconsider joining the TPP opens up another potential line of attack for some Democrats.
Democrats who face re-election in states Trump won in 2016 face pressure to support measures seen as bipartisan.