Hillary Clinton's latest batch of private emails shed new light on the insularity of her office and tensions with President Obama that were seemingly still simmering among her staff three years after he bested her for the Democratic nomination.

The 6,300 pages of emails published by the State Department Wednesday also revealed Clinton's preoccupation with how the press portrayed her and her policies.

What's more, the emails contained a higher volume of classified information than the past four months of email releases combined.

Tensions with Obama persisted

Cheryl Mills, Clinton's chief of staff, and Huma Abedin, her deputy, often passed press clippings to Clinton that cast Obama in a less-than-flattering light.

For example, in Sept. 2011, Abedin forwarded Clinton a story that indicated one third of Americans felt "buyer's remorse" about not electing her over Obama.

Another article, forwarded to Clinton by Mills in March 2011, laid out world events that had "tested" the president.

"[Obama's critics] say he's exhibiting a failure of leadership on a whole range of matters, symbolic and substantive, ranging from his lukewarm support for a Libyan no-fly zone to his willingness to let others, especially Republicans, take the lead on entitlement reform," the story said.

In June 2011, Mills forwarded Clinton a Politico article that highlighted the hundreds of Obama bundlers who had landed plush government jobs or won lucrative federal contracts after helping him win the presidency, despite his promise to eliminate such cronyism from Washington.

Mills sent another article to Clinton in Sept. 2011 that was written by James Carville, a longtime ally and friend to the Clintons. The Carville piece urged Obama's White House to "panic" as the 2012 presidential election neared and Republicans in Congress attempted to flout the president's agenda.

Shielded by insiders

Because Clinton used a private email account and server to shield her official communications, she was accessible — at least by email — to just a few trusted aides inside and outside the State Department.

Anyone else who wanted to reach her apparently had to go through some of the insiders that have surrounded the Democratic candidate for years.

Sidney Blumenthal, a divisive confidante who was denied a State Department job, communicated frequently and directly with Clinton about a broad range of subjects. Blumenthal provided unvarnished opinions and, at times, unvetted intelligence to the secretary of state.

For example, in Aug. 2010, Blumenthal gave Clinton "some thoughts on the Tea Party." The scathing memo came less than three months before Tea Party-backed candidates swept into Congress during the midterm elections.

"The momentum of the right urgently needs to be blunted," Blumenthal wrote. "It must be redefined; the political discussion must be shaped and shifted; and the GOP must be put on the defensive and begin to pay the price."

Other aides kept a steady stream of positive press and outside praise flowing to Clinton.

Insiders like Mills forwarded Clinton stories she thought the secretary would like or highlighted instances in which Clinton was mentioned favorably by prominent figures.

Clinton maintained her ties to top staffers even after they had left their full-time positions at the State Department. Anne Marie Slaughter, a close Clinton friend, departed the agency in Feb. 2011 but continued to advise Clinton on weighty matters.

Slaughter gave Clinton a list of talking points in March 2011 that she said would help Clinton define the U.S. stance on Libya.

Preoccupied with press

Clinton and her staff were deeply concerned with the way reporters interpreted their actions. Hundreds of press clippings indicate they paid extra attention to stories that examined Clinton's standing within the administration and how the U.S. strategy in Libya was being portrayed.

Clinton herself kept an eye on articles that mentioned her name.

For example, she seemed distressed by an anonymous quote in a July 2010 story that suggested Israeli Prime Minister Benjamin Netanyahu refused to meet with her because she was "out of the circle of influence." The quote seems to have been brought to her attention by Blumenthal.

She asked an aide about the story: "Where's this coming from?"

In another instance, Clinton asked Mills what she thought of a column by Maureen Dowd of the New York Times that praised Clinton for her support of women's rights in Saudi Arabia.

Emails show State Department aides were often concerned with how to frame issues for the press, discussing talking points and media strategies with at least as much frequency as policy and internal operations.

Explosion of classified intel

The new batch of Clinton emails contained 215 classified documents, which was more than the classified emails included among troves released in May, June, July and August combined.

Previously, the State Department had decided to classify 188 emails.

Despite the fact that 403 emails have now been classified, the State Department maintains that none should have been considered classified when written. Instead, the agency argues circumstances that have developed since Clinton's tenure warrant retroactive classification in all 403 cases.

The explosion of classified emails in the latest batch may have reflected the nature of events in the world during the time they were written, which was late 2010 and into 2011. During that period, the Arab Spring swept the Middle East, and Clinton dealt with a push to join NATO in airstrikes against Libya as the civil war there escalated.

As the intensity of international events heightened, so too did the frequency of sensitive conversations between Clinton, her aides and State Department staffers on the ground.