The McMaster controversy, explained in less than 60 seconds

You may have heard recently that there has been a controversy surrounding President Donald Trump's national security adviser, Gen. H.R. McMaster, but you may not have been able to keep up with the particulars. If so, you're not alone. Here's what you need to know.

Trump expressed his confidence in McMaster on Thursday after the general recently came under fire from pro-Trump media. But why?

The critics:

• McMaster recently fired several National Security Council officials who were hired by former national security adviser Michael Flynn, sparking the ire of some of Trump’s nationalist supporters.
• Some of the president’s supporters objected to McMaster’s approval of sending more troops to Afghanistan and for warning the president that Russian President Vladimir Putin is an adversary of the U.S.
• Some McMaster critics have charged that he is anti-Israel.
• McMaster recently renewed security clearances for several members of the Obama administration, including former Obama national security adviser Susan Rice.
• Pro-Trump websites have recently launched a slew of attacks against McMaster. Among numerous stories critical of McMaster, Breitbart wrote that McMaster “purged loyalists” from the Trump administration. Infowars dubbed McMaster “greatest national security threat.”