HIALEAH, Fla. — Jeb Bush and his supporters still have a pile of money to spend — remnants of $100 million raised when he seemed early this year to be a sure bet. They have an expansive ground operation in New Hampshire. And allies have just began a new ad campaign in Iowa.

But nothing they have tried so far has lifted Mr. Bush’s terrible poll numbers. And with just four weeks remaining until voting begins, Mr. Bush needs to do something to save his candidacy.

It may be too late: Other campaigns appear to have counted him out altogether. But, in extensive interviews over the past week, aides and key allies to Mr. Bush described a long-shot plan to pull off what seems all but impossible — winning the Republican nomination for president. The plan has six elements.

Read the article “How Jeb Bush Hopes to Save His Candidacy” on nytimes.com.