6 business issues that could shape the political debate in 2015 by Ben Geier @FortuneMagazine January 20, 2015, 3:09 PM EST E-mail Tweet Facebook Google Plus Linkedin Share icons President Obama is expected to use his State of the Union address this evening to call on Congress to raise taxes on the nation’s wealthiest, which would generate revenue to fund tax breaks for low and middle-income households. The speech is likely to launch a debate on taxes and the economy that will shape not only Obama’s legacy as president, but also the 2016 presidential campaign, which will soon gain traction as heavyweight contenders throw their hats into the ring. Other issues expected to dominate the upcoming presidential campaign include immigration and Wall Street regulation. It may seem too early to discuss the 2016 campaign, but the wheels are already turning. Former Florida Governor Jeb Bush and former Hewlett-Packard’s HPQ CEO Carly Fiorina have both formed exploratory committees on the Republican side, and they may be joined soon by other popular candidates, such as Rand Paul, Ted Cruz and Chris Christie. On the Democratic side, everyone is waiting for official word from former Secretary of State Hillary Clinton, while progressives are whipping themselves into a frenzy over a potential run from anti-Wall Street stalwart Elizabeth Warren, currently a Senator from Massachusetts. Here’s a breakdown of the major issues that could be at the center of the debate as we ramp up to the voting next year.