Reuters IT was Michele Bachmann's big moment in the political spotlight and Rick Perry stomped all over it. Despite her victory on Saturday in the Iowa straw poll, the first big test of the 2012 Republican US presidential campaign, Bachmann had to share the national stage with Perry's public leap into the White House race. It won't be the last time the congresswoman from Minnesota and the governor of Texas step on each other's toes. Both aim for the backing of the same bloc of religious and social conservatives who dominate Iowa's kick-off nominating contest. Both hope to become the chief Republican alternative to nominal front-runner Mitt Romney in the 2012 fight for the right to challenge President Barack Obama. And both will be in Waterloo, Iowa, Bachmann's birthplace, on Sunday night to speak at a local fund-raising dinner in what looks like Act One of a beautiful rivalry. “Perry is the looming presence in Michele Bachmann's future,” said Dennis Goldford, a political scientist at Drake University in Des Moines, Iowa. “They appeal to the same people.” Perry and Bachmann share a deep Christian faith, a hearty distrust of the federal government and core conservative principles on social issues like abortion and gay marriage. But Bachmann, founder of the Tea Party caucus in Congress and an early supporter of the movement to reduce spending and government, has faced more questions than Perry about whether she can expand her appeal to a broader electorate. Her straw poll win showed the power of her appeal to conservatives in Iowa but making her pitch to moderates and independents in states like New Hampshire and Florida could prove a tougher task. “Right now, she can capture the hearts of the right wing,” Republican consultant Alex Castellanos said on CNN. “But she has to prove that she can be a general election candidate before Republicans will really take her seriously and move her into that top tier.” At the straw poll, Bachmann left no doubt about where she was aiming her remarks. “Whether we are Tea Party or social conservatives or fiscal conservatives or national security conservatives, if we stick together ... greatness will once again belong to the United States of America,” she said. __