Venezuela's Maduro regime says it's investigating Guaidó over blackouts

Juan Guaidó arrives at the National Assembly on Monday. Photo: Ronaldo Schmidt/AFP/Getty Image

Venezuela's attorney general has announced that National Assembly leader Juan Guaidó, recognized by the U.S. and more than 50 other countries as the country's interim president, is under investigation for an alleged attack on Venezuela's power grid, per AP.

Why it matters: Venezuela has been hit by crippling power outages over the past five days. President Nicolás Maduro tried to blame the U.S. and is now targeting Guaidó, who remains free and whose safety is considered a red line by the Trump administration. Fears of escalation were already growing after Secretary of State Mike Pompeo last night announced an evacuation of the U.S. embassy in Caracas.

Go deeper: Power outages across Venezuela have left Maduro wobbling

What's next

New York Times endorses Elizabeth Warren and Amy Klobuchar for president

Democratic presidential candidates Sens. Elizabeth Warrenand Sen. Amy Klobuchar at the December 2020 debatein Los Angeles. Photo: Justin Sullivan/Getty Images

The New York Times editorial board has endorsed Sens. Elizabeth Warren and Amy Klobuchar for president, in a decision announced on national television Sunday night.

Why it matters: The board writes in its editorial that its decision to endorse two candidates is a major break with convention that's intended to address the "realist" and "radical" models being presented to voters by the 2020 Democratic field.

Go deeperArrow1 hour ago - Media

What's next in the impeachment witness battle

Sens. Susan Collins (R-Maine) and Lisa Murkowski (R-Alaska). Photo: Tom Williams/CQ-Roll Call, Inc via Getty Images

Senators will almost certainly get to vote on whether or not to call impeachment witnesses. The resolution laying out the rules of the trial, which will be presented Tuesday, is expected to mandate that senators can take up-or-down votes on calling for witnesses and documents.

Yes, but: Those votes won't come until the House impeachment managers and President Trump's defense team deliver their opening arguments and field Senators' questions.

Inside Trump's impeachment strategy: The national security card

White House counsel Pat Cipollone and acting Chief of Staff Mick Mulvaney. Photo: Jabin Botsford/The Washington Post via Getty Images

Trump officials say they feel especially bullish about one key argument against calling additional impeachment witnesses: It could compromise America's national security.

The big picture: People close to the president say their most compelling argument to persuade nervous Republican senators to vote against calling new witnesses is the claim that they're protecting national security.