Hillary ClintonHillary Diane Rodham ClintonLate night hosts targeted Trump over Biden 97 percent of the time in September: study 10 steps toward better presidential debating Continuity is (mostly) on the menu for government contracting in the next administration MORE is nearing the end of a long Democratic primary that will almost certainly leave her as the party’s presidential nominee.

It has also revealed weaknesses that Clinton will need to fix in order to defeat presumptive GOP nominee Donald TrumpDonald John TrumpNearly 300 former national security officials sign Biden endorsement letter DC correspondent on the death of Michael Reinoehl: 'The folks I know in law enforcement are extremely angry about it' Late night hosts targeted Trump over Biden 97 percent of the time in September: study MORE in the fall.

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Picking the right vice presidential candidate will be a key decision for Clinton as she looks to strengthen her campaign for the fall.

Here are the candidates getting the most buzz in Clintonworld.

Sen. Tim KaineTimothy (Tim) Michael KaineDemocrats have no case against Amy Coney Barrett — but that won't stop them Pence-Harris debate draws more than 50M viewers, up 26 percent from 2016 Five takeaways from the vice presidential debate MORE (Va.)  

The former governor turned senator has become a favorite among Clinton insiders.

They see the centrist as a rising star in the Democratic Party would could help Clinton carry Virginia, a must-win state for Republicans.

Team Clinton likes that Kaine has good ties with the business community, has foreign policy chops and is well-versed in the party apparatus — he is as former chairman of the Democratic National Committee.

Kaine, who was also very high on President Obama’s short-list in 2008, is also well-liked among his peers in the Senate.

“Tim Kaine is the best choice in my mind out of all [the potential candidates for VP.],” said one Democratic strategist. “He has the best quality of being a VP: loyal soldier, no delusion of being POTUS, all the donors love him. Fluent in Spanish, and just a great guy.” 

Clinton’s biggest weakness in the primaries has been with white men, a constituency where Kaine could help her.

He wouldn’t be the most exciting choice, and has views that are similar to Clinton’s — which could be seen as a drawback in some quarters.

Others say that’s not a problem.

“They seem to reflect each other, which is fine,” said Jim Manley, a Democratic strategist and former aide to Senate Majority Leader Harry ReidHarry Mason ReidBottom Line Biden owes us an answer on court-packing Progressive group: Feinstein must step down as top Democrat on Judiciary panel MORE (D-Nev.).

Sen. Sherrod BrownSherrod Campbell Brown Senate Democrats call for ramped up Capitol coronavirus testing Dems to focus on issues, not character, at Barrett hearings Mnuchin says he and Pelosi have agreed to restart coronavirus stimulus talks MORE (Ohio)

Brown is another name getting a lot of buzz.

He’s a favorite in media circles on the left. No less than MSNBC star Rachel Maddow has hailed Brown as a smart VP pick who would help Clinton connect to white, working-class men.

Brown could obviously be helpful in swing-state Ohio, and Clintonites think Brown’s brand of authentic progressivism could be a hit in other Rust Belt states such as Michigan—where Clinton surprisingly lost the Democratic primary to Bernie SandersBernie SandersThe Hill's Morning Report - Sponsored by Goldman Sachs - Tipping point week for Trump, Biden, Congress, voters Biden and Schumer face battles with left if Democrats win big Push to expand Supreme Court faces Democratic buzzsaw MORE.

A progressive who has been a longtime critic of globalization, he might also bring over some Sanders supporters who are considering staying home on Election Day.

“He would be an attractive counter-balance,” Manley said.

Brown has repeatedly said he is not interested, however, and some people believe him.

Another negative? Ohio Gov. John Kasich would get to choose his replacement, endangering a Democratic Senate majority.

Sen. Elizabeth WarrenElizabeth WarrenOvernight Health Care: Trump takes criticism of Fauci to a new level | GOP Health Committee chairman defends Fauci | Birx confronted Pence about Atlas Senate Democrats call for ramped up Capitol coronavirus testing Government watchdog to investigate allegations of Trump interference at CDC, FDA MORE (Mass.) 

No pick — aside perhaps from Sanders himself — would excite the Feel the Bern crown more than Warren.

Team Clinton is more intrigued than ever about a Clinton-Warren ticket, and some strategists say the longer Sanders stays in the race, the more likely Clinton could pick Warren to be her running mate.

Warren remains the only Democratic woman in the Senate who has not endorsed Clinton, an irksome fact to some in Clinton’s orbit.

But Warren’s Twitter war with Trump over the last week has raised her vice presidential stock tremendoustly.

 “@realDonaldTrump: Your policies are dangerous, your words are reckless. Your record is embarrassing. And your free ride is over,” Warren wrote in one recent Tweet.

 “She has turned out to be an amazing surrogate,” said one longtime Clinton ally. “And she knows what she’s doing.”

Labor Secretary Thomas E. PerezThomas Edward PerezClinton’s top five vice presidential picks Government social programs: Triumph of hope over evidence Labor’s 'wasteful spending and mismanagement” at Workers’ Comp MORE

Perez is very well-liked in the White House and maintains a close relationship with Obama chief of staff Denis McDonoughDenis Richard McDonoughThe swamp wasn't drained — it expanded Susan Rice calls for Flynn-Kislyak transcripts to be released GOP seeks to go on offense using Flynn against Biden MORE.

Many see him as having all the right attributes to fill the ticket and win over progressives.

Unions love him, plus he speaks fluent Spanish could help further drive Latinos to Clinton's column. 

Perez told reporters this week that he has had “no conversations” about a possible VP role.

Instead, he said, he is focused on his job and “in my spare time” is also helping to elect Clinton. 

Gov. John Hickenlooper (Co.) 

Some in Clintonworld say the Colorado governor's name should be on any short list.

For starters, a win in Colorado would cement the race for Clinton.

Hickenlooper has also been a loyal soldier to Clinton during the primary, particularly when his state voted for Sanders by nearly 20 percentage points.

Clinton and Hickenlooper spent time together in April when she attended a fundraiser at his home.

Insiders say if he doesn't get a nod for VP, Clinton will likely consider him for a cabinet position, should she be elected.