WASHINGTON -- In remarks later Tuesday, President Barack Obama will slam the Republican budget plan put forward by Rep. Paul Ryan (R-Wis.) as "nothing but thinly veiled Social Darwinism."

"It's a Trojan Horse," Obama will say during remarks at an Associated Press Luncheon, according to excerpts released by the White House.

"Disguised as [a] deficit reduction plan, it's really an attempt to impose a radical vision on our country. It's nothing but thinly-veiled Social Darwinism. It's antithetical to our entire history as a land of opportunity and upward mobility for everyone who's willing to work for it -- a place where prosperity doesn't trickle down from the top, but grows outward from the heart of the middle class. And by gutting the very things we need to grow an economy that's built to last -- education and training; research and development -- it's a prescription for decline," the president will say.

Staying on that theme, Obama will go on to address how prosperity in the United States has never trickled down from "the success of a wealthy few." Instead, he'll say, it comes from the success of a strong middle class.

"That's how a generation who went to college on the GI Bill, including my grandfather, helped build the most prosperous economy the world has ever known," he'll say. "That's why a CEO like Henry Ford made it his mission to pay his workers enough so they could buy the cars that they made. That's why studies have shown that countries with less inequality tend to have stronger and steadier economic growth over the long run."

Obama will give remarks and take questions at the Washington, D.C. event around 12:30 p.m.