Ahead of Tuesday's primary in California, Clinton and Sanders are neck-in-neck. And in other politics news, Donald Trump got a (delayed) endorsement from House Speaker Paul Ryan.
Here's a look back at those stories and the week's other top news — in the form of five charts:
1. Clinton, Sanders in Dead Heat in Crucial Primary
Hillary Clinton is clinging to a narrow two-point lead over Bernie Sanders in California ahead of the state's June 7 primary, according to results from a NBC News/Wall Street Journal/Marist poll. Clinton gets support from 49 percent of likely Democratic primary voters in the state, while Sanders gets 47 percent. Clinton and Sanders running even in California wouldn't affect the overall delegate math in the Democratic race, where Clinton leads Sanders by some 270 pledged delegates and 770 overall delegates. But a Sanders victory in California could potentially give him justification to remain in the race heading into July's Democratic convention in July, despite trailing in the delegate math.
2. Paul Ryan Says He Will Vote for Trump
Three weeks after pointedly refusing to endorse Donald Trump, House Speaker Paul Ryan backed down on Thursday and announced his support. Far from a wholehearted embrace of his party's 2016 standard-bearer's policies and temperament, Ryan's announcement on Thursday mainly emphasized that Trump would be a better ally to advance Ryan's policy goals than likely Democratic nominee Hillary Clinton. NBC News had proclaimed Trump the presumptive nominee 29 days ago on May 4, after Trump's final GOP rivals exited the race. But Ryan withheld his support at the time, instead highlighting his concerns with the likely nominee.
3. 5 Soldiers Dead, 4 Missing in Texas Flooding
The search continued Friday morning for four service members who went missing when fast-moving Texas floodwaters swept away their truck Thursday, killing five fellow soldiers. Three other soldiers inside the vehicle were rescued when the tactical vehicle overturned during a training exercise at Fort Hood military base. The search for the missing soldiers, meanwhile, could be hampered by more bad weather Friday — coming during a period of historic flooding across the entire state that had claimed at least nine dozen other lives.
4. Former UCLA Student Kills Professor, Himself
A former UCLA doctoral student, Mainak Sarkar, stuffed guns and ammunition in a backpack and drove from his Minnesota home to Los Angeles, where he gunned down a former professor, killed himself, and taunted authorities with a chilling note, the Los Angeles police chief said. A multi-state investigation revealed a third body — that of Sarkar's wife, 2,000 miles away in Minnesota. It also led authorities to a "kill list" that named another UCLA professor, who was later found safe, Los Angeles Police Chief Charlie Beck said Thursday.
5. Prince Died of Accidental Overdose of Painkiller
Music legend Prince was killed by an overdose of the powerful painkiller fentanyl, Minnesota health officials said Thursday. Fentanyl is a synthetic opioid up to 100 times more potent than morphine that is used for severe pain such as advanced cancer, according the Centers for Disease Control. Although it can be obtained by prescription, many overdoses are linked to illegally made versions of the drug, officials say. It's not clear if Prince got fentanyl from a doctor or another source or how long he was taking it. His death is the subject of a multiagency probe that includes the DEA and federal prosecutors.