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Jeb Bush struggles to stay relevant in presidential race

HIAWATHA, Iowa (AP) -- Jeb Bush's supporters have spent $15 million on slickly produced ads to win over Iowa voters. But the former Florida governor is getting more personal with voters as he struggles ahead of the state's caucuses.

On Sunday, Bush jogged across a crowded town hall-style meeting to embrace a 67-year-old supporter.

Jeb Bush: Donald Trump "would not exist were it not for Barack Obama"

Bush, once considered the Republican presidential front-runner, is doing whatever it takes to stay relevant in the 2016 contest. His super PAC had spent more on Iowa ads than all the groups helping other GOP candidates combined.

All the while, businessman Donald Trump has maintained a huge lead over the so-called establishment candidates like Bush.

Jeb Bush mocks argument between Marco Rubio, Ted Cruz on immigration

Bush's team privately jokes they've successfully lowered expectations headed into Monday contest by having scored just 2 percent in the Des Moines Register's weekend poll.