More than 50 interviews with Democratic leaders revealed a party struggling to decide what it believes in, what issues to prioritize and how to confront an aggressive right-wing administration.

To be confirmed as health secretary, Robert F. Kennedy Jr. can afford to lose no more than three Republican votes if all Democrats are united in their opposition to him.

The prospect of legal challenges to President Trump’s purges may be a feature, not a bug, for adherents of sweeping presidential authority.

On a call with Senator Chuck Schumer, the minority leader, six Democratic governors pushed him to slow down the confirmation of President Trump’s nominees and to do more to block his agenda.

With the court signaling it will release a decision on Friday, lobbyists for the app pushed lawmakers to shift course.

The New York senator, who swallowed concerns for months and then stalled for time on sharing them with President Biden, ultimately told him he risked going down as one of the “darkest figures.”

Democrats are demanding that Republicans slow consideration of picks for the new administration until they can review background checks, as the G.O.P. faces major pressure to quickly confirm them.