Bernie Sanders

The former Democratic candidate may have been mentioned more than the Green Party's own presumptive nominee, Jill Stein, at the third party's convention this weekend in Houston.

The Clinton campaign says its systems were not hit but that a program it uses was in the party's compromised system. The Democratic Congressional Campaign Committee was also hacked.

For many die-hard Bernie Sanders fans, the historic moment of Hillary Clinton's nomination inspired not ecstasy but conflicting feelings.

The death of the vice president's eldest son derailed his own hopes for the White House. But he once had better approval ratings than Hillary Clinton and may have been a more competitive nominee.

"Brothers and sisters, this is the real world that we live in," Bernie Sanders tried to say over the noise.

"I will feel horrible if Donald Trump is elected, I will feel horrible if Hillary Clinton is elected," says Green Party candidate Jill Stein. She says the two big parties lock out other voices.

Finally, many party operatives felt, the big wheels of Hillary Clinton's juggernaut would mesh and roll forward together. But another story about emails emerged to steal the storyline.

As Democrats prepare for their convention in Philadelphia, protesters are preparing too. Bernie Sanders supporters and others are organizing rallies around the city.

Virginia Sen. Tim Kaine's positions on Wall Street reforms and trade deals are already drawing the ire of groups who had backed Clinton's primary rival Bernie Sanders.

A new poll suggests Clinton still lags far behind Bernie Sanders among voters 30 and younger.

The Vermont senator's endorsement is the conclusion to the long, surprising Democratic primary fight. Clinton praised Sanders, and Sanders returned the favor, saying it was important to elect Clinton.

Democratic sources familiar with negotiations between the campaigns say a formal endorsement is expected.