(AP Photo)

ADEL, Iowa – Republican vice presidential nominee Paul Ryan has been working this week to compare President Obama to former president Jimmy Carter, arguing that the country’s years under the 39th president “look like the good old days compared to where we are now.”

But on Wednesday morning, Ryan compared Obama to a different Democratic president – former President Bill Clinton, who is set to address the Democratic National Convention in Charlotte this evening.

“My guess is we’ll get a great rendition of how good things were in the 1990s, but we’re not going to hear much about how things have been in the last four years,” Ryan, speaking before a crowd of several hundred in this small town west of Des Moines, said of Clinton’s upcoming speech. “And by the way, under President Clinton, we got welfare reform ... which moved people from welfare to work, to get people out of poverty. President Obama is rolling back welfare reform.”

Independent fact checkers have deemed the Republican welfare reform argument inaccurate.

Republicans have in recent months sought to drive a wedge between Clinton and Obama, casting Clinton as a leader who pursued bipartisan compromise and Obama as a president who has taken his party farther to the left. Clinton is expected to reject the Republicans' claim about Obama's welfare policy in his speech tonight as he places Obama's name in nomination.