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Then-Defense Secretary James Mattis and President Trump last year. Photo: Win McNamee/Getty Images

Former Defense Secretary James Mattis had "deep concerns" about a request late last year from national security adviser John Bolton for options to attack inside Iran, according to a source close to Mattis.

The big picture: "There were deep concerns about any efforts to escalate a conflict with Iran," the source told me. As the Wall Street Journal first reported, Bolton's request came "after militants fired three mortars into Baghdad's sprawling diplomatic quarter, home to the U.S. Embassy, on a warm night in early September. The shells — launched by a group aligned with Iran — landed in an open lot and harmed no one."

Behind the scenes: Mattis thought that attacking inside Iran risked escalating a conflict with an Iranian proxy into war with a nation state — the Iranian regime. The source told me that despite Mattis' concerns, the Pentagon provided the White House with options to counterattack against Iran.

  • In response to questions for this article, National Security Council spokesman Garrett Marquis said: "The NSC coordinates policy and provides the president with options to anticipate and respond to a variety of threats. We continue to review the status of our personnel following attempted attacks on our embassy in Baghdad and our Basra consulate and will consider the full range of options to preserve their safety and our interests."
  • And Pentagon spokesman Col. Rob Manning responded: "The Department of Defense is a planning organization and provides options to the president for decision. Discussions between the secretary of defense and the president are privileged."

Go deeper:

Go deeper

26 mins ago - Politics & Policy

Republicans’ secret lobbying

Illustration: Shoshana Gordon/Axios

The five Senate Republicans who helped negotiate and draft the $1.2 trillion bipartisan infrastructure bill have been privately courting their Republican colleagues to pass the measure in the House.

Why it matters: House GOP leaders are actively urging their members to oppose the bill. The senators are working to undercut that effort as Monday shapes up as a do-or-die moment for the bipartisan bill.

CBC members nix border visit

A Haitian migrant carries a toddler on his shoulders today as he crosses the Rio Grande River. Photo: Pedro Pardo/AFP via Getty Images

Several members of the Congressional Black Caucus weighed visiting the U.S.-Mexico border this week to investigate the conditions faced by Haitian migrants and protest allegations of inhumane treatment by U.S. agents.

Why it matters: It's a thorny proposition both in terms of timing and messaging. Going assures a new wave of negative headlines for President Biden amid sinking popularity. And with congressional deadlines in the coming days over infrastructure, a possible government shutdown and debt-limit crisis, Democrats can't afford to lose any votes in the House.

Jan. 6 select committee subpoenas four Trump aides

Photo: Alex Wong/Getty Images

The Jan 6. select committee investigating the deadly Capitol riot has subpoenaed four aides to former President Trump for testimony and documents.

Why it matters: Former White House chief of staff Mark Meadows, former communications official Dan Scavino, former Defense Department official Kash Patel and former Trump adviser Steve Bannon were all in touch "with the White House on or in the days leading up to the January 6th insurrection," the committee said in a release.