Sen. Lindsey Graham, R-S.C., stated on Sunday that he supports the Senate voting to reopen the federal government but emphasizes that he will not negotiate on extending Affordable Care Act subsidies with the government still closed.

“I’m willing to vote to open the government up tomorrow,” Graham said on “Meet the Press.” “To my Democratic friends: I am not going to vote to extend these subsidies.”

Meanwhile, Sen. Mark Kelly, D-Ariz., blasted Republicans for refusing to negotiate with Democrats, saying Trump had spoken to Democratic leaders for only an hour about the ACA subsidies.

“I think it’s important for all Americans to know that this fight right now over this government shutdown is about one thing. It’s about the cost of their health care,” Kelly said.

Politics in brief

• Biden’s new treatment: Former President Joe Biden is undergoing a new phase of radiation therapy and hormone treatment for an aggressive form of cancer that was diagnosed in May, a spokesperson said.
• Voting rights at stake: The Supreme Court this week will hear a Louisiana redistricting dispute, which the conservative majority could use to further weaken the landmark Voting Rights Act enacted to protect minority voters.

• Closing the gender gap: As Erika Kirk takes over Turning Point USA, Republicans hope she can fix one of the party’s biggest issues: attracting young women voters.

Diane Keaton, Oscar-winning actor, dies at 79

Diane Keaton, the actor beloved for her roles in the “Godfather” films and “Annie Hall,” has died at age 79, her daughter confirmed to NBC News.

Keaton, known for her wit, humor and sparkling charm, was a longtime Hollywood star with a career spanning six decades. Her first major big-screen roles came in 1972 in the film “Play It Again, Sam” and as Kay ams in the iconic film “The Godfather.”

She won the Oscar for her role in Woody Allen’s rom-com “Annie Hall” in 1977. The Academy of Motion Picture Arts and Sciences said in a tribute that Keaton “filled every frame with warmth, wit, and wonder.”

Inside the scramble to save lives as heat menaces two Southwestern counties

As climate change increases the frequency and intensity of heat waves, two counties in one of the fastest-warming parts of the United States offer a cautionary tale about what it takes to save lives in the face of the growing threat.

Maricopa County, Arizona, has invested heavily in heat cooling centers, increased public messaging about heat safety and hired a full-time heat relief coordinator.

As a result, it recorded fewer heat deaths last year than the year before, despite record temperatures.

But a different story has played out in Clark County, Nevada, where deaths from heat more than tripled in just three years, with a record 513 people killed last year. This year’s death toll is still preliminary, but heat deaths are likely to number in the hundreds.

The prospects of teams once considered Super Bowl contenders now look grim. Philadelphia has lost two straight games. Buffalo’s 13-game home winning streak was snapped in an upset. And the Kansas City Chiefs have suffered more losses already than they did all of last season.

The Detroit Lions seem to be an outlier, quietly building one of the best cases for Super Bowl contention.

Even after key coaching staff members left, the Lions have scored 174 points. The defense also ranks in the top three in sacks, pressures, quarterback hits and forced fumbles.

Can Detroit maintain its notable start?

• Lions-Chiefs on ‘Sunday Night Football’: Detroit came out flat in Week 1 against the Green Bay Packers but is aiming to improve to 5-1 when it visits Patrick Mahomes and Co. in Kansas City. NBC News is covering all the action live.
• Former NFL quarterback and Fox Sports analyst Mark Sanchez has been released from the hospital and was briefly booked into the Marion County Jail after he was charged with felony battery.

Notable quote

Dancing frogs, peacocks and unicorns outside the federal immigration building have presented a joyful contrast to the Trump administration’s portrait of Portland, Oregon, with protesters calling their countermeasure “Operation Inflation.”

In case you missed it

• Sixteen people are believed to have died in a powerful blast at an explosives plant in Tennessee, officials said, as crews continue to recover remains and carefully clear the site.
• High school homecoming celebrations in Mississippi ended in gunfire, with two separate shootings killing at least eight people and injuring more, authorities said.
• Amy Poehler returned to host the 50th-anniversary episode of “Saturday Night Live,” which also included appearances from Tina Fey, Aubrey Plaza and Seth Meyers.