DAVENPORT — Republican presidential hopeful Marco Rubio, whose fortunes are rising in the race for president, packed a Davenport restaurant Wednesday, telling the crowd that next year’s election is a “generational choice” and that many of the nation’s policies were drafted decades ago and are in need of change.“The world is different from it was five years ago, not to mention 50 or 60 years ago,” said Rubio, who referred to Social Security, Medicare and tax and anti-poverty programs as from different eras.Rubio argued that entitlement programs need to be changed in light of the nation’s debt, saying younger generations may need to retire later and might later in life be buying private insurance via Medicare.The first-term Florida senator, who won praise for his performance in the debate in Milwaukee on Tuesday night, covered a range of topics in front of a crowd his campaign estimated at 400.