Lab Leak Fight Casts Chill Over Virology Research Scientists doing “gain-of-function” research said that heightened fears of lab leaks are stalling studies that could thwart the next pandemic virus.

Biden Will Get $80 Million Ad Boost From Climate Group Climate Power says the lack of awareness and understanding of the president’s record on environmental issues is hurting him in the polls.

Judge to Consider Gag Order on Trump in Federal Election Case Defense lawyers and prosecutors will square off over whether the former president should be restricted in what he can say about the proceedings after a string of threatening statements.

There’s Still No House Speaker. What Happens Now? The House is entering its second week without a speaker. Here is how a new one could be elected, or how the process could go off the rails yet again.

F.B.I. Tracks Increased Threats to Jews and Muslims After Hamas Attack F.B.I. officials said that they were reaching out to faith leaders to discuss potential threats against their communities.

Biden Administration Seeks Emergency Aid Package for Both Israel and Ukraine Aid to Ukraine lapsed last month amid Republican resistance, while aid for Israel in its war with Hamas has drawn bipartisan support in recent days.

How Fred Daibes, a Real Estate Tycoon, Was Implicated in the Menendez Case Fred Daibes, a New Jersey builder, was accused of defrauding a bank that he had founded. Prosecutors say he turned to Senator Robert Menendez for help.

Fearing Escalation, Biden Seeks to Deter Iran and Hezbollah The administration has grown increasingly anxious that Israel’s enemies may seek to widen the war with Hamas and has both sent diplomatic messages and deployed military assets to prevent it.

Biden Warns Israel Not to Occupy Gaza While the president has stood strongly behind Israel since Hamas attacked, he said on “60 Minutes” that a new occupation of Gaza would “be a big mistake.”

DeSantis and Haley Diverge on Help for Gaza Refugees The two Republican candidates appeared to diverge on attitudes toward civilians in the Gaza Strip who are bracing for an invasion by Israel.

DeSantis Will Participate in Nevada Caucuses Despite Criticizing Them The state party enacted new rules that the Florida governor and his rivals say are designed to help former President Donald J. Trump.

In Conservative Media, Biden Is to Blame in the Hamas-Israel War Much of the coverage from the right has focused on the Biden administration’s decision to transfer $6 billion to Iran in a deal to secure the release of five Americans.

Nikki Haley’s Pro-Israel Record Could Shape Her ’24 Bid The G.O.P. contender’s combative defense of Israel defined her tenure at the United Nations. Will it also define her presidential campaign?

Tanya Chutkan, an Unflinching Judge in the Trump Jan. 6 Trial Judge Chutkan, who grew up in a prominent Jamaican family and has extensive trial experience, has been thrust into the limelight. She shows no sign of being intimidated by it.

‘Get in the Game’: G.O.P. Candidates Plead Their Case to Major Donors Rivals to Donald J. Trump and their strategists told financiers that time is running out to build up a viable alternative to the former president.

Federal Firefighters Face Steep Pay Cuts A temporary pay raise for federal wild-land firefighters is set to end next month. Officials have said that more workers will quit if lawmakers fail to pass a permanent increase.

Inside Trump’s Backroom Effort to Lock Up the Nomination As the former president dodges debates, it can seem as if he’s bypassing the primary. But he and his team have been working quietly to twist the delegate rules in their favor.

How Kari Lake’s Tactical Retreat on Abortion Could Point the Way for the GOP Kari Lake, along with other Republicans in battleground states, has come out against a national ban as candidates try to attract general election voters. Anti-abortion activists aren’t pleased.

Ambler Access Project Would Cause Environmental Harm Analysis Finds A proposed industrial road would cut through pristine wilderness in Alaska to reach a planned copper and zinc mine.

U.S. Tells World to Back Israel’s Gaza Strikes as Civilian Toll Rises Secretary of State Antony J. Blinken is visiting the Middle East as the Israel-Palestinian conflict reaches a degree of violence not seen in many years.