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US poll battle moves to Wisconsin US poll battle moves to Wisconsin
(about 2 hours later)
The White House race is continuing in Wisconsin as Democrats Barack Obama and Hillary Clinton seek a boost in their close battle for the party nomination.The White House race is continuing in Wisconsin as Democrats Barack Obama and Hillary Clinton seek a boost in their close battle for the party nomination.
Polls opened despite freezing temperatures, with officials expecting a big turnout.Polls opened despite freezing temperatures, with officials expecting a big turnout.
Republicans are also holding their own contest, but front-runner John McCain is widely expected to win.Republicans are also holding their own contest, but front-runner John McCain is widely expected to win.
A Democratic caucus will be held in Hawaii, while Republicans in Washington state vote in a primary.A Democratic caucus will be held in Hawaii, while Republicans in Washington state vote in a primary.
Mr Obama is expected to win in Hawaii, where the Illinois senator was born.Mr Obama is expected to win in Hawaii, where the Illinois senator was born.
Polls close in Wisconsin at 2000 (0200 GMT Wednesday) and in Washington state at 2000 (0400 GMT Wednesday).
Hawaii voting does not begin until 1900 on Tuesday (0500 GMT Wednesday).
Seeking momentumSeeking momentum
Wisconsin's 74 Democratic delegates are at stake.Wisconsin's 74 Democratic delegates are at stake.

Democrats

Hillary Clinton13 states, 1,218 delegates
Arizona, Arkansas, California, Florida, Massachusetts, Michigan, Nevada, New Hampshire, New Jersey, New Mexico, New York, Oklahoma, Tennessee
Barack Obama21 states, 1,281 delegates
Alabama, Alaska, Colorado, Connecticut, Delaware, Georgia, Idaho, Illinois, Iowa, Kansas, Louisiana, Maine, Maryland, Minnesota, Missouri, Nebraska, North Dakota, South Carolina, Utah, Virginia, Washington state2,025 delegates needed for nomination. Source AP (includes all kinds of delegates)Q&A: US election delegates

Republicans

Mike Huckabee8 states, 245 delegates
Alabama, Arkansas, Georgia, Iowa, Tennessee, West Virginia, Kansas, Louisiana
John McCain15 states, 903 delegates
Arizona, California, Connecticut, Delaware, Florida, Illinois, Maryland, Missouri, New Hampshire, New Jersey, New York, Oklahoma, South Carolina, Virginia, Washington state
Mitt Romney11 states, 253 delegates
Campaign suspendedAlaska, Colorado, Maine, Massachusetts, Michigan, Minnesota, Montana, Nevada, North Dakota, Wyoming, Utah1,191 delegates needed for nomination. Source: AP (includes all kinds of delegates)
The result in the northern state will not be a killer blow to either side, but a strong win for Hillary Rodham Clinton or Barack Obama could set them on the course to eventual victory, says BBC North America editor Justin Webb.

Democrats

Hillary Clinton13 states, 1,218 delegates
Arizona, Arkansas, California, Florida, Massachusetts, Michigan, Nevada, New Hampshire, New Jersey, New Mexico, New York, Oklahoma, Tennessee
Barack Obama21 states, 1,281 delegates
Alabama, Alaska, Colorado, Connecticut, Delaware, Georgia, Idaho, Illinois, Iowa, Kansas, Louisiana, Maine, Maryland, Minnesota, Missouri, Nebraska, North Dakota, South Carolina, Utah, Virginia, Washington state2,025 delegates needed for nomination. Source AP (includes all kinds of delegates)Q&A: US election delegates

Republicans

Mike Huckabee8 states, 245 delegates
Alabama, Arkansas, Georgia, Iowa, Tennessee, West Virginia, Kansas, Louisiana
John McCain15 states, 903 delegates
Arizona, California, Connecticut, Delaware, Florida, Illinois, Maryland, Missouri, New Hampshire, New Jersey, New York, Oklahoma, South Carolina, Virginia, Washington state
Mitt Romney11 states, 253 delegates
Campaign suspendedAlaska, Colorado, Maine, Massachusetts, Michigan, Minnesota, Montana, Nevada, North Dakota, Wyoming, Utah1,191 delegates needed for nomination. Source: AP (includes all kinds of delegates)
For Mrs Clinton in particular, a good showing might allow her campaign to find its feet again after a string of recent losses, while for Mr Obama success would add to the growing sense that he is now the front-runner, our correspondent says. The result in the northern state will not be a killer blow to either side, says BBC North America editor Justin Webb.
But a strong win for Hillary Rodham Clinton or Barack Obama could set them on the course to eventual victory, he adds.
For Mrs Clinton in particular, a good showing might allow her campaign to find its feet again after a string of recent losses.
For Mr Obama, success would add to the growing sense that he is now the front-runner, our correspondent says.
On the Republican side, the race between John McCain and Mike Huckabee continues.On the Republican side, the race between John McCain and Mike Huckabee continues.
Two-tiered contest McCain favourite
Mr McCain, who is well ahead in delegates and has the support of the party establishment, is expected to win.Mr McCain, who is well ahead in delegates and has the support of the party establishment, is expected to win.
On Monday, former President George Bush Senior endorsed Mr McCain in his bid to be the Republicans' presidential nominee.On Monday, former President George Bush Senior endorsed Mr McCain in his bid to be the Republicans' presidential nominee.
The Washington Republican primary is the second half of a two-tiered nominating contest as the state's Republicans held a caucus on 9 February, which was narrowly won by Republican front-runner John McCain.The Washington Republican primary is the second half of a two-tiered nominating contest as the state's Republicans held a caucus on 9 February, which was narrowly won by Republican front-runner John McCain.
Republicans only allocate about half of their delegates on the basis of the primary - the rest were decided earlier in the caucus.Republicans only allocate about half of their delegates on the basis of the primary - the rest were decided earlier in the caucus.
The state's Democrats are also holding a primary, but it is an essentially empty exercise, since their delegates to the party's summer nominating convention were chosen on the basis of caucuses held last month and earlier this month.The state's Democrats are also holding a primary, but it is an essentially empty exercise, since their delegates to the party's summer nominating convention were chosen on the basis of caucuses held last month and earlier this month.