Former US Secretary of State Hillary Clinton and her husband former US President Bill Clinton hold up some steaks at the 37th Harkin Steak Fry in Indianola, Iowa, Sept 14, 2014. [Photo/Agencies]

INDIANOLA, Iowa - Former Secretary of State Hillary Clinton stoked speculation on Sunday that she was moving closer to announcing a bid for the White House in 2016 as she visited the early-voting state of Iowa to take part in the state's annual "steak fry," a gathering of Democratic activists that often attracts presidential hopefuls.

After grilling steaks with her husband, former US President Bill Clinton, Hillary Clinton delivered a populist speech to the crowd of more than 6,000 Democrats at a vast green field a few miles outside of Des Moines. She defended US President Barack Obama's signature healthcare initiative known as Obamacare, pushed legislation on a minimum wage and lambasted Republicans as "guardians of gridlock."

Clinton focused much of her speech on promoting Iowa's Democratic candidates, including Senate hopeful Bruce Braley, who is vying in a closely watched race in the 2014 midterm elections on Nov 4.

But she was coy as she parried questions about her intentions in 2016.

"Too many people only get excited about presidential campaigns," she said. "Look, I get excited about presidential campaigns."

"We're just here to support Democrats," Clinton added.

Still, 2016 was in the air, particularly when Iowa Senator Tom Harkin, the host of the steak fry, referred to Clinton and her husband as "the comeback couple" and said "there are many more chapters that will be written in the amazing life of Hillary Clinton."

It was a reference to the nickname "comeback kid" used by the media to describe Bill Clinton's rebound in his 1992 campaign from early setbacks.

In 2008, Hillary suffered an embarrassing defeat in the Iowa caucus, coming in third behind Barack Obama, who went on to win the presidency, and John Edwards.