By David Lightman/Washington/TNS

The 2016 presidential race is shaping up as an epic struggle between generations.
On one side are the ageing baby boomers who came of age in the 1960s and whose generation now is heading toward retirement - Democrat Hillary Clinton, who would be 69 on Election Day and the second oldest president ever, and Republican Jeb Bush, who would turn 64 soon after becoming president.
On the other is a wave of younger faces who came of age in the 1980s, including Republicans Marco Rubio, 43; Ted Cruz, 44; Scott Walker, 47; Chris Christie and Rand Paul, each 52.
It’s not just the candidates who make this a generational battle. It’s voters. Younger people see the world differently. They’re far more willing to embrace social changes  and to communicate electronically. Older voters, though, are hardly fading away. They remain determined to see a secure Social Security and Medicare system, a more efficient healthcare operation and more direct aid to help struggling workers.
Rubio, who would be the third-youngest person ever to be sworn in as president, summoned the need to hand the baton to his generation when he kicked off his campaign by telling a Miami audience that the generation before him “put us at a disadvantage by taxing, borrowing and regulating like it’s 1999”. As he spoke to New Hampshire activists last Friday, supporters passed out signs saying, “Marco Rubio A New American Century”.
Clinton’s announcement video and tours of Iowa and New Hampshire in recent days tried to assure younger people, particularly the racial minorities who make up an important part of the Democratic Party’s base, that with government’s help they could lead fulfilling middle-class lives while their parents are assured of being comfortable. But her appeal was far less targeted to that generation. She spoke in broader strokes, stressing the crying need for economic fairness.
Republicans are going out on riskier limbs. Christie last week offered a detailed plan to revamp Social Security and Medicare, including raising the eligibility ages and phasing out Social Security benefits for those earning more than $80,000 from other sources.
Few serious presidential candidates would have dared to tinker with those programmes even a few years ago. Today, such blueprints are a potentially effective strategy for mobilising a new wave of voters, those born during and after the Reagan administration.
Those younger voters tend to be more conservative and less loyal to any specific political party, said Kei Kawashima-Ginsberg, director of Massachusetts-based CIRCLE, which studies young voter trends.
“Young people would like to be interactive with government,” said Kawashima-Ginsberg. “They want to see politicians being responsive.”
Older voters also want responsiveness, but of a different sort. The elderly population is expected to more than double by 2050, with most growth between now and 2030, according to the Census Bureau.
“We are facing an unprecedented age dependency,” people who will rely on Social Security and Medicare, said William Frey, a senior fellow and demographics expert at Washington’s Brookings Institution.
Older people tend to vote in bigger numbers and have shown themselves more inclined to support Clinton or Bush.
The younger voters are a growing counterforce. Frey noted that “the most important element of our demographic transformation is the one occurring at younger ages.” Hispanics, blacks and others “will replace their aging white counterparts,” he said.
Frey estimated that in a dozen years, more than half the young adult labour force will be racial minorities.

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