Iowa Democrats gather Sunday for Sen. Tom Harkin's annual Steak Fry fundraiser, headlined this year by former President Bill Clinton and former Secretary of State Hillary Rodham Clinton. Things to know:
Nothing actually gets fried. "In 37 steak fries, they've never fried a steak," said Democratic consultant Jeff Link. But they called it a steak fry at the first, in 1972 near Winterset, and the name stuck.
In the past two competitive Democratic presidential campaigns, the event served as a valuable opportunity for candidates to practice getting their supporters mobilized.
Who has attended? More like who hasn't. Bill Clinton will be making his fourth Steak Fry appearance on Sunday. He was the headliner in 1992, weeks before he was elected president, and returned in 1996. He came again in 2003, along with the entire slate of Democrats running for president. In 2006, Sen. Barack Obama's appearance drew a packed crowd, a sign of his rising popularity.
Harkin is retiring, and it's not completely clear what will replace the event.
No steak for Joe: Vice President Joe Biden is returning to the key presidential state of Iowa next week, reminding voters not to count him out of the next presidential campaign. The White House says Biden will be in Des Moines on Wednesday. He'll speak at an event for a Catholic social justice group called Nuns on the Bus. Last year, Biden was the headliner at the Steak Fry.
State of play
A CNN/ORC International poll of registered Iowa voters, out Friday, measured support for 2016 presidential prospects.
Republicans