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Evan Vucci, Associated Press
Audience members listen to Republican presidential candidate, former House Speaker Newt Gingrich during a campaign stop at Xtreme Manufacturing, Thursday, Feb. 2, 2012 in Las Vegas.

LAS VEGAS — Newt Gingrich said Thursday he believes "we should care about the very poor," unlike GOP presidential rival Mitt Romney.

And fresh off a defeat in Florida, the Republican is challenging the state's winner-take-all policy that allows Romney to scoop up all 50 available delegates.

Gingrich spokesman R.C. Hammond said the campaign was sending the Republican Party of Florida a letter asking them to enforce rules that say delegates should be awarded proportionally.

Touring a Las Vegas manufacturing plant on Thursday, Gingrich tied Romney and Democratic President Barack Obama together and tried to contrast himself against them.

Gingrich said Romney and Obama think all the poor need is a safety net.

But the former House speaker said what the poor really need is a trampoline "so they can spring up."

Gingrich's comments were a clear jab at Romney, who said earlier this week that he is focused on helping the middle class because poor people have a safety net.

Gingrich was campaigning in Nevada ahead of Saturday's GOP caucuses there.