Hillary ClintonHillary Diane Rodham ClintonFBI head rejects claims of Ukrainian 2016 interference Comey in op-ed after IG report: 'Barr needs to stop acting like a Trump spokesperson' Trump tops list of most tweeted about politicians in 2019 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 TrumpLawmakers release defense bill with parental leave-for-Space-Force deal House Democrats expected to unveil articles of impeachment Tuesday Houston police chief excoriates McConnell, Cornyn and Cruz on gun violence 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 KaineOvernight Health Care — Presented by That's Medicaid — Deal on surprise medical bills faces obstacles | House GOP unveils rival drug pricing measure ahead of Pelosi vote | Justices to hear case over billions in ObamaCare payments Key House and Senate health leaders reach deal to stop surprise medical bills 'Granite Express' flight to take staffers, journalists to NH after Iowa caucuses 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 ReidNevada journalist: Harry Reid will play 'significant role' in Democratic primary The Hill's Morning Report - Sponsored by AdvaMed - A crucial week on impeachment The Hill's Morning Report — Pelosi makes it official: Trump will be impeached MORE (D-Nev.).

Sen. Sherrod BrownSherrod Campbell BrownOn The Money: White House, Dems edge closer to trade deal | GOP worries about Trump concessions | DOJ argues Congress can't sue Trump on emoluments | Former Fed chief Volcker dies Both sides have reason to want speedy Trump impeachment trial Lawmakers battle over future of Ex-Im Bank 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 SandersLawmakers release defense bill with parental leave-for-Space-Force deal Gabbard says she won't participate in next debate even if she qualifies Overnight Health Care — Presented by That's Medicaid — Deal on surprise medical bills faces obstacles | House GOP unveils rival drug pricing measure ahead of Pelosi vote | Justices to hear case over billions in ObamaCare payments 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 Ann WarrenGabbard says she won't participate in next debate even if she qualifies On The Money: White House, Dems edge closer to trade deal | GOP worries about Trump concessions | DOJ argues Congress can't sue Trump on emoluments | Former Fed chief Volcker dies UN International Anticorruption Day highlights democracy as a human right 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 McDonoughFormer Obama officials willing to testify on McCabe's behalf: report Trailer shows first look at Annette Bening as Dianne Feinstein 2020 Democrats fight to claim Obama's mantle on health care 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.