As Iran retaliates, largest US military base in Middle East hit by ballistic missile, Qatar says

On a call with Republicans on Sunday, House Speaker Mike Johnson told lawmakers a vote on the war powers resolution will likely be held on Thursday, two sources told ABC News.

Democrats and a handful of Republicans have demanded a vote on the resolution, which would require Congressional approval before the president orders any further military action in Iran. The measure is sponsored by Rep. Ro Khanna, D-Calif., and Rep. Thomas Massie, R-Ky.

ABC News has learned that Republican leadership is urging members to vote against it. Johnson also reminded Republicans on the call that attendance is important. With a razor-thin majority, Johnson can only afford to lose one vote if all members are voting and present.

While there is some bipartisan support for the war powers resolution, Republicans have the majority in the House and the president has veto power.

Johnson also told Republicans he plans to hold another vote this week on Dept. of Homeland Security funding, as the partial government shutdown continues.

-ABC News' Rachel Scott and Lauren Peller

The Gang of 8 and key leaders of national security committees are expected to receive a classified briefing on Iran from Trump administration officials on Monday, multiple sources told ABC News.

Members of the Gang of 8 include the top bipartisan House and Senate leaders and the chairs and ranking members of the House and Senate intelligence committees.

As ABC News previously reported, the House and Senate will receive a classified briefing from the administration on Tuesday.

-ABC News' Jay O’Brien, Lauren Peller and Allison Pecorin

The Israel Defense Forces announced further strikes against Iran in the early hours of Monday.

The IDF said the Israeli Air Force has launched another wave of strikes toward "targets of the Iranian Terror Regime in the heart of Tehran."

-ABC News' Will Gretsky

Oil is trading at $72.39 a barrel, up 8% since the attacks in Iran took place.

This comes as Rystad Energy says that traffic in the Strait of Hormuz is at a virtual standstill.

Dow futures are down about 500 points as of Sunday night.

The most important question for oil markets is what happens in the Strait of Hormuz, one of the world’s most important chokepoints for oil. Roughly 20% of the world’s oil passes through the Strait, according to the U.S. Energy Information Administration.

According to the EIA, the strait is deep enough and wide enough to handle the world's largest crude oil tankers. Saudi Arabia and the UAE have some infrastructure in place that can bypass the Strait of Hormuz, which may mitigate any transit disruptions through the strait.