WASHINGTON - US Democratic presidential nominee Barack Obama regained his lead in the latest national over his Republican rival John McCain, as the country's gloomy economic situation made the issue a priority for American voters. "Senator Obama is right back where he was before the so-called convention bounces with a four-point lead," said Maurice Carroll, director of the Quinnipiac University polling institute. "The Democratic discombobulation after the selection of Governor (Sarah) Palin as the Republican running mate seems to be steadying." The polls all attributed Obama's resurgence to his economic policies' popularity among American voters. In the Quinnipiac poll, 51 percent said that McCain's proposed tax cut policy would only help the rich, while 9 percent said it would aid the middle class. In a contrast, 33 percent said Obama's tax plans would help the middle class and only 9 percent said it would benefit the rich. The poll also found that Obama still had a two digit lead among women voters, after McCain named Alaska female governor Sarah Palin as his running mate. He also had a 91 percent lead among African-Americans and remained popular among young voters and those over 55, while independents were split 46 to 45 percent.