Hillary Clinton Democratic presidential nominee Hillary Clinton endorsed

President Barack Obama endorsed presumptive Democratic presidential nominee Hillary Clinton 

"I don't think there's ever been someone so qualified to hold this office," Obama said

"I want those of you who have been with me since the beginning of this incredible journey to be the first to know that I'm with her," Obama continued. "I am fired up. And I can't wait to get out there and campaign with Hillary."

Obama will campaign with Clinton next week in Green Bay, Wisconsin.

"It's probably the first of many campaign events between now and November," White House Press Secretary Josh Earnest said, adding that no more campaign events are scheduled yet. Earnest said Obama recorded his video Tuesday.

His endorsement made note of the historic nature of Clinton's being the first female presidential nominee of a major political party. Obama's endorsement brings full circle a relationship that began when the two were rivals in the hard-fought 2008 Democratic nominating contest.

Clinton thanked Obama for his endorsement in a tweet posted to her account Thursday.

"Honored to have you with me, @POTUS. I'm fired up and ready to go!" she wrote, signing it with '-H' to indicate the tweet was from the former secretary of state personally.