IE 11 is not supported. For an optimal experience visit our site on another browser.

KNOW IT ALL: Monday's Top 7 Stories at NBC News

Here's a look at today's key headlines.

Good morning. Here are some of the headlines we're following this morning:

1. Who's on President Obama's Shortlist to Replace Scalia?

Legal pundits and close followers of the Supreme Court have begun to speculate on whom President Barack Obama may nominate in the wake of Justice Antonin Scalia's death. Here are a few of the names that have floated to the top.

2. Ruth Bader Ginsburg on Scalia: 'We Were Best Buddies'

Supreme Court Justice Ruth Bader Ginsburg said Sunday that she and her unlikely friend Justice Antonin Scalia "disagreed now and then" but even so, "we were best buddies." Scalia and Ginsburg differed greatly in ideologies, but bonded over a shared love of the opera and "our reverence for the Constitution and the institution we serve," she said. Read more in NEWS.

3. As Polar Vortex Moves Out, Snow Moves In

Cold weather records across the Northeast were shattered on Valentine's Day after the polar jet stream shot a mass of Canadian arctic air south. Warmer temperatures are expected Monday — but so is more hazardous weather, with snow, freezing rain and some potential flooding on the way. Read more in NEWS.

4. McCain Threatens to Subpoena U.S. Sailors Held by Iran

Sen. John McCain said Sunday he would subpoena 10 U.S. sailors to testify about their brief detention by Iran if the Obama administration doesn't hand over the findings of an investigation into the incident by the end of the month. Read more in NEWS.

5. Olmert Becomes First Israeli Prime Minister to Go to Prison

Israel's former Prime Minister Ehud Olmert started serving a 19-month sentence for bribery and obstruction of justice Monday, making him first Israeli premier to be imprisoned. The 70-year-old's incarceration capped a years-long legal saga that forced him to resign in 2006 amid the last serious round of Israeli-Palestinian peace talks. Read more in NEWS.

6. Disgraced Ex-N.Y. Gov. Spitzer Denies Choking Woman

Authorities are investigating allegations that disgraced former New York Gov. Eliot Spitzer assaulted a woman at a Manhattan hotel, sources told NBC News. A spokeswoman for Spitzer denied the report. Read more in NEWS.

7. Police Seize $900 Million in Meth Hidden in Bra Inserts

Australian law enforcement agencies discovered 1.26 billion Australian dollars ($900 million) worth of methylamphetamine hidden in imported boxes of silicon bra inserts and art supplies in the country's largest haul of the illicit drug in its liquid form, officials said Monday. Read more in NEWS.

8. Kanye Asks Zuckerberg for Help, Says He's $53M in Debt

It wouldn't be a typical week in the Kanye West hype machine without some head-scratching moments. Read more in POP CULTURE.