MSNBC's Joe Scarborough tweeted: "Smile. You just had a big night." Others commented that she was "shouting angrily." The response to their criticism on Twitter was swift.
Tuesday night's five electoral contests could spell the end of the road for at least two Republican candidates, while Bernie Sanders is hoping Rust Belt wins will boost him against Hillary Clinton.
The relationship between President Obama and Senate Majority Leader Mitch McConnell the last 7 years has been often confrontational and awkward, marked by occasional bouts of productive deal-making.
One popular campaign stop on the trail ahead of the Florida primary is a retirement community called "The Villages." NPR explores why it's such a magnet for presidential campaigns.
The NPR politics team brings us analysis on the vote in the Ohio and North Carolina primary contests. Polls are also closing in Florida, Missouri and Illinois.
The 2016 Teacher of the Year in that state decided it was about time the people who write the laws that affect schools actually see the inside of a classroom.