Obama hits campaign trail, says ready to 'pass baton' to Clinton

US President Barack Obama stands with Democratic US presidential candidate Hillary Clinton during a Clinton campaign event in Charlotte, North Carolina, US, July 5, 2016. [Photo/Agencies]

JOINT APPEARANCE DELAYED

The first joint campaign appearance by Obama and Clinton was initially planned for soon after she clinched the Democratic nomination. But it was postponed following the mass shooting on June 12 at a nightclub in Orlando, Florida.

On Tuesday, Obama appeared at ease back on the campaign trail. He mocked Trump's promise to "Make America Great Again," saying, "America is really great."

And he sought to contrast Clinton's preparedness for the White House and passion for helping working families with Trump, a political neophyte he referred to at times as "the other guy."

"Everybody can tweet, but nobody actually knows what it takes to do the job until you've sat behind the desk," he said, an apparent reference to the wealthy New York businessman's fondness for Twitter.

Clinton hopes to reclaim North Carolina for the Democrats in the Nov. 8 election. Obama won the state in the 2008 general election but lost it narrowly in his 2012 re-election.

Obama's appearance with the former first lady closes a circle on a relationship that began cordially when the two were US Senate colleagues, grew tense when they were presidential rivals in 2008, and became close when Clinton served in Obama's Cabinet during his first term.

Clinton and her family have played a role in Obama's elections. Clinton and Obama appeared together in Unity, New Hampshire, following their divisive primary fight in 2008, and Clinton's husband, former President Bill Clinton, gave a well-received speech at the 2012 Democratic convention.

Obama has focused on what he touts as Clinton's strength of character, in hopes of shoring up support among voters who find her untrustworthy, a weakness Trump has sought to exploit.

Clinton needs Obama to woo young and left-leaning voters who backed Sanders and who made up part of the president's voting coalition in 2008 and 2012. Clinton has also campaigned with high-profile liberal US Senator Elizabeth Warren, and she will appear later this week with Vice President Joe Biden.

Clinton and Obama traveled to North Carolina on the presidential plane Air Force One, which Trump characterized as a burden on taxpayers. A Clinton spokesman said the campaign would cover its portion of the travel costs.