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

Donald Trump and Bernie Sanders rocketed to victories in New Hampshire.

Good morning. Here are some of the stories we're following today:

1. Trump and Sanders Rattle Establishment, Roll to Victories

Republican Donald Trump and Democrat Bernie Sanders swept to convincing victories in the New Hampshire primaries on Tuesday night, providing them momentum for future contests and sending shock waves through the anxious political establishments of both parties. Read more in POLITICS.

2. N.H. Loss Reveals Underlying Weaknesses of Clinton Candidacy

Sanders ran the tables among nearly every subset of the Democratic electorate here, according to NBC News exit polls, even beating Clinton by a handful of points among women. His showing among young voters was even more eye-popping, with fully 75 percent of voters under 45 rejecting Clinton’s candidacy. Read more in POLITICS.

3. Kasich's Positive Message Fueled Runner-Up Finish

Ohio Gov. John Kasich’s moderate views and positive message helped him stitch together enough votes to emerge as the second place finisher Tuesday in New Hampshire’s Republican primary. Kasich said he wanted to avoid the negative tone of his opponents, and that approach seems to have paid off, according to the NBC News Exit Poll. Read more in POLITICS.

4. Feds Can't Access Contents of San Bernardino Shooters' Phone

FBI chief James Comey cited that problem as an illustration of authorities' frustration with technology that allows cell phones to lock with no apparent means to override that default position, slowing all sorts of cases, from terror conspiracies to more ordinary criminal investigations — even when a judge rules that the phone contained useful data. Read more in NEWS.

5. Supreme Court Blocks New EPA Air Pollution Rules

The U.S. Supreme Court on Tuesday blocked enforcement of the Obama administration's ambitious new plan for cutting greenhouse gas emissions from power plants. The justices granted a plea from 30 states that asked for a temporary hold on the new Clean Energy Plan while the lower courts decide whether the Environmental Protection Agency has the legal authority to impose it. Read more in NEWS.

6. What’s Killing Americans? Guns, Cars and Drugs

Guns, vehicle crashes and drug overdoses help explain a big part of why Americans die, on average, so much younger than people in other countries, government researchers said Tuesday. They looked at three very American causes of death and found they go a long way to explaining the gap between the U.S. and other rich countries such as Austria and Britain. Read more in HEALTH.

7. Bacteria Have Ability to 'See,' Eye-Opening Study Finds

Bacteria can see, using their entire one-celled selves as a tiny camera lens to focus light, researchers reported Tuesday. The ability goes beyond just a vague sense of where the light is, and allows the one-celled organisms to find just the right spot, the team reported in the journal eLife. Read more in SCIENCE.

8. Drive-Thru Gator Stunt Was 'Stupid,' Man Charged Says

A Florida man arrested Monday for allegedly throwing an alligator through a Wendy’s drive-thru window admitted Tuesday the stunt wasn’t well thought out, and said “my pranking days are over.” Read more in NEWS.