Johnson urges Secret Service director to resign

The big picture: House and Senate lawmakers are both set for briefings Wednesday from federal officials amid questions about security lapses at Saturday's Pennsylvania rally.

• While multiple committees have launched probes into the events surrounding the shooting, Johnson argued that the task force will be beneficial in side-stepping attempts to gain information.
• "The reason we're going to do it that way is because that is a more precision strike," he told Fox. "It goes quicker, there's not a lot of the procedural hurdles and we'll have subpoena authority."
• The speaker said the task force would have slots for Republicans and Democrats.

Zoom in: Johnson said he was initially in contact with Homeland Security Secretary Alejandros Mayorkas "within hours" of the shooting, and he "did not have satisfactory answers at that time."

• The speaker said he's since also spoken with FBI leaders and Director of National Intelligence Avril Haines

• "There's real questions. Let's just put it that way," he said, adding, "The answers have not been forthcoming."
• In an interview with ABC News, Cheatle called the shooting "unacceptable," and pledged to work with Congress on its oversight efforts.

What's next: Johnson said that the task force will launch Monday, but it's unclear what the leadership or makeup will be.

• Some lawmakers want to see it headed by a member of the House, while others would like it to be led by an outside official, two sources told Axios.

Go deeper: Secret Service questioned on security shortcomings at Trump rally

Editor's note: This story has been updated with additional reporting.