Iowa caucuses: Cruz wins; Clinton declares victory

Hillary Clinton declared victory early Tuesday morning in a razor-thin contest against Bernie Sanders in Iowa. But Democratic party officials have not yet declared a winner.

"Hillary Clinton has won the Iowa Caucus," the Clinton campaign said. "After thorough reporting - and analysis - of results, there is no uncertainty and Secretary Clinton has clearly won the most national and state delegates."

However, Iowa party Chairman Andy McGuire said the results were the closest in Iowa Democratic caucus history.

"We will report that final precinct when we have confirmed those results with the chair," he said.

Republican Ted Cruz bested Donald Trump, raising questions about the billionaire's reliance on his celebrity instead of traditional political organization.

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