The ideological divisions over health care, immigration and race are testing the strength of the early front-runner's candidacy.
2. OHIO RALLY A TEST FOR TRUMP
The president's gathering in Cincinnati will be a test for both candidate and crowd, the first since his audience chanted "Send her back!" about Somali-born Rep. Ilhan Omar. 3. NORTH KOREA DETAILS LATEST WEAPONS TEST
Kim Jong Un supervised the first test firing of a new multiple rocket launcher system that could potentially enhance its ability to strike targets in South Korea and U.S. military bases there. 4. HOW PHOENIX'S RACE RELATIONS ARE TINGED
The Arizona capital's past segregation has been in focus after last month's national outrage over a videotaped encounter of police pointing guns and cursing at a black family. 5. 'ERRATIC' LIVED UP TO ONLINE PERSONA
Paige Thompson, the 33-year-old former Amazon software engineer accused of hacking Capital One, made little attempt to hide her attack. 6. WHAT IS DISAPPEARING
Flagships stores for Gap, Tommy Hilfiger, Lord & Taylor and Polo Ralph Lauren have closed their doors in New York City because of skyrocketing rents and the shift to online shopping.
7. IMPEACHMENT THRESHOLD HITS MILESTONE
Nearly half the House Democrats now support an impeachment inquiry of Trump, AP finds, but Speaker Nancy Pelosi is still likely not to be swayed. 8. WHY RWANDA CLOSED ITS BORDER
The East African nation closed its border with Congo over the deadly Ebola outbreak.
9. EXPENSIVE STYLISTS, FLASHING COCKTAIL ICE CUBES
Jurors in Katy Perry's copyright infringement trial get a glimpse into what it costs to market a major pop hit. 10. ASTROS 'ACE' DEAL Houston gets a huge lift for its World Series aspirations by adding top-line starter Zack Greinke to an already imposing rotation.