John Weston, Eric Buckland and Mike Bloomberg don't have much in common.
Weston is a farmer struggling to keep in business the 1,000-acre farm his family has operated in Western Maine for seven generations.
Buckland is an entrepreneur who runs a small high-tech manufacturing company in North Carolina's famed Research Triangle Park that makes handheld retinal scanners.
And Mike Bloomberg is the billionaire mayor of New York who doesn't have many struggles at all.
This week, though, all three were deeply disappointed in Barack Obama and Mitt Romney. After Bloomberg released a detailed report and held press conferences on Monday urging both candidates to make immigration a serious issue in this year's presidential campaign, the response from both campaigns was dead silence.
That neither campaign responded to Bloomberg's challenge suggests that the brief moment when the choice of Paul R. Ryan as Romney's running mate might hearken a serious debate about America's future seems to be passing. There is still time for a change, but this is increasingly a campaign about polarizing the country, not unifying it.
For both campaigns, leading a serious discussion about how to fix immigration is apparently not their priority. "I think the campaigns each want to play to their bases," said John Feinblatt, Bloomberg's chief policy adviser, "and are ignoring mounting evidence that shows immigration should be part of our economic policy."
Obama's enactment by executive order of a program that allows illegal immigrants to apply for deportation deferrals attracted thousands of applicants this week. The move will also clearly help Obama attract Hispanic voters, a key factor in this year's election.
But Obama's initiative doesn't fix the underlying system. On Monday, with the backing of corporate executives, elected officials and a hundred university chancellors, Bloomberg called for a massive overhaul of U.S. immigration policy. Citing a report that immigrants start more new business than native-born Americans, Bloomberg called for four changes:
Automatically grant green cards to any foreign graduates students who receive advanced degrees in the STEM area - science, technology, engineering and math.
Create an "entrepreneur visa" for foreigners who want to come to the United States, have a detailed business plan and have persuaded venture capitalists or other qualified investors to invest in their idea.
Increase the percentage of visas granted on the basis of economic need from the current 7 percent.
And create a guest worker program for seasonal and labor-intensive industries like farming and resort hotels.
From a tractor in Maine and hospital in North Carolina, Weston and Buckland both cheered. Months before Bloomberg made his proposal, both men complained that Washington's failure to enact immigration reform was slowing their businesses.
In a February visit to his company, Buckland told me that U.S. immigration policies blocked him from hiring the talented foreign-born graduate students he desperately needs at his small company, which was spun out from the Duke University Biomedical Engineering Department.
He was encountering a shortage of qualified applicants, he said, because low rates of native-born Americans were studying STEM fields. When Buckland advertised for software and optical engineering positions, he received only five to 10 applicants, and 75 percent of them were foreign-born.
"We need that talent if we're going to compete globally, period," Buckland told me in a phone interview this week. "The ability to find talented software engineers has been one of our largest challenges."
Buckland said he was 18 months behind where he had hoped to be in developing software programs that help doctors operate the scanners his company manufactures. He said the sole focus on even greater tax breaks for investors as a way to spark economic growth was misguided.
"Do we have enough technical talent to grow our knowledge economy?" Buckland asked. "My answer is no."