HOW DO YOU FILL A JEB-SHAPED HOLE?:

In early November, Bush trekked to Wisconsin, where he also told reporters he doesn't think ObamaCare will work. "If the objective is, don't worry about the budget, we'll just finance it the same way we're financing our deficits right now, build a bigger debt, you could see this thing surviving," he said. "But it will have failed what the promises were. It will have failed the American people. And I don't think it will bend the cost curve."

In June, he laid out a four-point plan to revive the economy that included approving the controversial Keystone XL pipeline, raising education standards, and passing comprehensive immigration reform.

Bush has long been a favorite of establishment Republicans and deep-pocketed GOP donors who urged him to run for the White House in 2012. He is seen as a strong voice advocating for a humane approach to immigration reform -- a stance that puts him at odds with large swaths of the conservative electorate, but ultimately helps him with one of the fastest-growing sectors of the American electorate: Latino voters.

It doesn't hurt that his brother, George W. Bush, won the White House in 2004 with more than 40 percent of the Latino vote, the highest margin for a Republican in recent history.

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