The petition demanded an executive order requiring contractors to disclose spending.
Rubio accused the president of seeking to empower the Cuban government.
"Malia's school asked if I wanted to speak at commencement and I said no," he said.
The milestone comes despite heated opposition on Capitol Hill and around the country.
Obama said the U.S. had the "strongest, most durable economy in the world."
The White House will use the site to "add a new layer of context and commentary."
The Obama administration finalized 3,378 rules, a libertarian group found.
"This agreement represents the best chance we’ve had to save the one planet that we’ve got."
Twitter released a list of the most popular items on the social media platform this year.
The president and his daughters went to Upshur Street Books in the Petworth area.
The war of words over Syrian refugees between President Obama and the GOP is escalating.
Obama signed up for Twitter earlier this year.
"It's hurting our country badly," Rubio said.
Lobby hopes to swing public opinion and make gun actions politically unpalatable.
"This is the crowd that was dead set against betting on you," he says of the GOP field.
Obama is trying to get more states to accept the expansion under ObamaCare in his final year.
Edith Childs and Earl Smith supported then-Sen. Obama in his 2008 campaign.
If markets cooperate, the president will have a chance to tout his record next week.
Watch live in the video above as President Obama holds his final press conference of the year.
More watched Sunday's speech than each of his last three State of the Union speeches.
Top Democrats said they are "confident" the executive actions on immigration will be upheld.
The measure extends federal transportation funding until Dec. 4.
The night included a hostage incident in a concert hall, a restaurant shooting and an explosion at...
President Obama notified Congress that he intends to sign the Trans-Pacific Partnership.