Former Secretary of State Hillary Clinton will campaign for the Democratic nomination for president at the Iowa State Fair on Saturday, accompanied by former Sen. Tom Harkin, D-Iowa, her campaign announced today.

Harkin and his wife, Ruth, endorsed Clinton in an op/ed article published in The Des Moines Register.

Jeb Bush, the former Florida governor and Republican presidential candidate, is campaigning at the state fair today in the company of Sen. Charles Grassley, R-Iowa.

Meanwhile, New York businessman Donald Trump is mounting what Iowa Gov. Terry Brandstad, a Republican, calls “a real campaign” in Iowa, The Washington Post reported.

• The Des Moines Register — Harkin: Clinton shares my values on social and economic justice
• — Harkin endorses Clinton for president
• The Washington Post — An Iowa surprise: Donald Trump is actually trying to win