House Democrats are zeroing in on a framework for their impeachment case against President Donald Trump that will center on a simple “abuse of power” narrative involving the president’s actions regarding Ukraine, according to multiple people familiar with the deliberations.

As Democrats continue closed-door depositions with critical witnesses and prepare to move to the next phase of public hearings, they are wrestling over which elements and evidence to bring in, which to leave out. The goal is to explain to the public the reasoning and relevance of any eventual impeachment charges.

Democratic House committee chairs and leaders are still debating the need for additional articles or charges that extend beyond the president’s dealings with Ukraine, but Speaker Nancy Pelosi has been adamant that the case against Trump must be targeted and easy to communicate in order to build public support, according to those familiar with discussions.