Obama has spent more than $135 million — more than GOP challengers Romney and Rick Santorum combined — on his re-election apparatus, according to an Associated Press analysis of Federal Election Commission records.
Gingrich, the former speaker of the House of Representatives, plans to spend much less time in primary states and instead personally call delegates to try to persuade them to back him at the Republican National Convention in August.
Newt Gingrich fired one-third of his campaign staff, including his campaign manager. Gingrich's new strategy is to win GOP delegates individually, via social media, to position himself for the Republican convention.
The past 12 years have seen significant US high court decisions with wide-ranging effects on personal freedoms and national politics. Another key ruling is expected this summer on President Obama's health-care reform law. Here are some recent top rulings, all decided by 5-to-4 votes.
Both Mitt Romney and Rick Santorum have three states as they wait for results from Ohio to come in. With 91 percent of the Ohio votes tallied, Romney only has a 5,000 vote lead out of the 1.1 million votes that have been counted.