WASHINGTON -- House Republicans on Thursday passed a bill that would reverse what they call President Obama's relaxation of welfare-to-work requirements.

The House, on a mainly party-line 250-164 vote, passed a resolution that would force the administration to rescind new guidelines giving states more flexibility in how they administer the nation's main welfare program.

The vote coincides with a torrent of Republican campaign ads, rebutted by Democrats, that Obama is trying to gut the law that requires welfare recipients to find work.

The measure faces an uphill path in the Democratic-led Senate and would not be signed by the president. But the vote highlighted the Republican campaign charge that Obama is engaged in class warfare, a theme echoed by Republican rival Mitt Romney's recently revealed statement at a fundraiser that Obama represents the 47 percent of Americans who are dependent on government.