Obama details "Buffett Rule," says millionaires should pay at least 30 percent tax rate Billionaire investor Warren Buffett's secretary Debbie Bosanek sat in in First Lady Michelle Obama's box for the State of the Union addresss. In his State of the Union speech on Tuesday evening, President Obama expanded on a tax plan he has been discussing for several months: the "Buffett Rule." In his address, he called for people making more than $1 million per year to pay at least a 30 percent tax rate. Taxes and tax rates have been a hot-button issue in recent years as a way to pay for an increase in government spending and a rising deficit and debt. And in recent days, tax rates have gotten even more attention due to the release of GOP presidential candidate Mitt Romney's tax returns which show he paid less than 14 percent in taxes on $21.7 million of income in 2010 because his income came from investments rather than a salary. Mr. Obama told the Congress. The idea was named after billionaire Warren Buffett after he pointed out that he pays a lower tax rate than his secretary because the capital gains tax on investment income is 15 percent, far less than the highest tax bracket of 35 percent. Buffett's secretary, Debbie Bosanek, was among First Lady Michelle Obama's guests for the State of the Union speech. A lot of attention has been placed in the last year on those making more than $1 million, but previously and during the 2008 presidential campaign, Mr. Obama called for couples making more than $250,000 per year to pay higher taxes. In his State of the Union speech, he left the door open by not providing specifics for those making between $250,000 and $1 million. If you make under $250,000 a year, like 98 percent of American families, your taxes shouldn't go up. You're the ones who need relief," the president said. A CBS News/NYT poll released Tuesday shows that 52 percent of Americans think that investments should be taxed at the same rate as income. But many Republicans in Congress disagree. House Speaker John Boehner reiterated his opposition to raising taxes. "There's a reason we have low rates on capital gains," Boehner told reporters on Tuesday. That's because it spurs new investment in our economy and allows capital to move more quickly.