AMES, Iowa (October 26, 2012)-Republican Mitt Romney made amounts to an economic closing argument for his presidential campaign Friday.

Speaking to supporters in Iowa, the Republican candidate called for "bold changes" to help revive the economy and pledged to work with what he calls "good Democrats" to make it happen.

Romney did not offer specific plans or answer lingering questions about his economic policies, such as how he would pay for his tax plan or replace the president's health care law, but he did criticize President Barack Obama, saying the president has no proposals to meet "the challenges of the times."

He dismissed the president's signature legislative achievement as "his vaunted Obamacare" and said he would instead focus on saving Medicare and Social Security.

Romney also repeated many of his standard campaign themes, including his signature refrain that America can't afford another four years like the last four years.