1. House Democrats are raising the prospect of impeaching President Trump.

Just two days after Robert Mueller, above, testified before Congress, the House Judiciary Committee asked a federal judge to unseal grand jury evidence related to the special counsel. The court filing effectively declares that lawmakers have already started an impeachment investigation into the president. One hundred House members support an impeachment inquiry. Here’s who they are.

In his seven hours of testimony, Mr. Mueller defended his investigation’s conclusions about Moscow’s sweeping interference in the 2016 campaign — and he warned lawmakers that Russia was trying to do it again. Here’s what we learned from Mr. Mueller’s marathon on Capitol Hill.

Amid growing warnings about the potential for voting machines and databases to be hacked, states are buying new machines. But some experts say vulnerabilities remain.