A look at key races in states' primaries
300864
Governor: Four Republicans vied for the chance to challenge Democratic Gov. Janet Napolitano, including Don Goldwater, nephew of the late Barry Goldwater, former senator and presidential candidate. Napolitano is unopposed in her primary.
743989
Democrats Clinton and Obama split states; biggest prize projected for New York senatorSen. John McCain piles up projected wins -- including crown jewels California and New York Mike Huckabee projected for impressive wins in South; Mitt Romney cobbles together victories
8023
Â· Disastrous week after loss of aides and cash crisis  Â· Republican to focus on three key primary states
595613
There will be plenty of trends to track in Tuesdayâs free-for-all, as 43 contests in 24 states allocate 3,156 delegates on what could be the most significant night of the race to date.
341558
The US presidential campaign broadened its scope Sunday as top candidates set their sights on 22 states that hold primaries early next month, in the wake of US Senator Barack Obama's decisive win over Hillary Clinton in South Carolina.
602294
THE RACE: The presidential primary in South Carolina for Republicans and Democrats.
251774
Highlights of preliminary exit poll data in the Maryland and Virginia presidential primaries Tuesday:
757863
Former Massachusetts Gov. Mitt Romney has won at least 10 delegates in Michigan's Republican primary and Sen. John McCain has won at least three, an Associated Press analysis of primary results shows. There are 17 delegates still to be allocated.
503053
Voters in 24 states took part in presidential primaries and caucuses Tuesday that will help decide who's left standing to run for president. Here are some thoughts they shared:
355632
Mitt Romney scored a sorely needed victory in Michigan's GOP primary, benefiting from his ties to the state and scoring well on the voters' top issue: economic troubles. The Republican race now shifts -- for most of the candidates -- to Saturday's primary in South Carolina, a state legendary for dirty campaigning.
139792
With voters in 24 states finally having their say in the presidential nomination races, today's nearly national primary carries high stakes -- and high drama
347430
Both political parties have relatively close delegate races heading into Super Tuesday, when voters in nearly half the states and American Samoa will vote in primaries and caucuses.
113773
Some of the day's images as US voters go to the polls in primaries and caucuses
166592
THE RACE: The presidential race for Democrats and Republicans in New Hampshire.
202126
Next stop: Florida primary on Tuesday, Jan. 29
415197
THE RACE: The presidential race for Republicans, Democrats nationally
355961
THE RACE: The presidential race for Republicans, Democrats in Michigan.