Some suggested they should come from within the FBI ranks. Others floated Merrick Garland, Obama's Supreme Court nominee.
Meet six senators who will help shape the administration's moves, from health care to tax reform.
The president rattled off one of his early morning tweets to send a message to the former FBI director.
It ended with a surprise announcement, but Trump had been mulling for weeks about when to dismiss the FBI director.
Practically speaking, at issue right now are two very different approaches to a new a Russia investigation effort.
Flynn says two $40,000 payments were consulting fees. The Turkish businessman who paid him said they were for lobbying.
The visit comes as the Trump administration continues to face criticism over the firing of James Comey in the midst of an FBI investigation into the Trump campaign's ties to Russia.
Both Sally Yates, a holdover from the Obama adminsitration, and others in that administration say they warned the Trump White House about Flynn.
President Trump wants to roll back IRS rules that prevent nonprofits and churches from partisan political activity.