Michigan, Arizona GOP Primary: Poll Coverage And Webcast

The seemingly endless GOP primary goes through the states of Michigan and Arizona tonight, where Romney and Santorum are the key competitors, while Gingrich and Paul focus elsewhere. BBC reports [6]: "Both men have been campaigning intensively over the past few days. Pre-primary polls gave Mr Romney a marginal lead in Michigan, and a stronger advantage in Arizona. Analysts say a victory in his home state of Michigan is key for Mr Romney. He has long been seen as the front-runner and favourite for the nomination - and currently leads the race for delegates - but has struggled to win over a strong majority of conservative Republican voters. Most polls will close in Michigan at 20:00 EST (01:00 GMT), where 30 delegates are at stake. Delegates will be awarded to candidates in each congressional district, with two at-large delegates also awarded. In Arizona, where polls will close at 19:00 local time (02:00 GMT), 29 delegates will be awarded to the winner of the state's primary."

Again from BBC, here are some of the findings from the exit poll"

six out of 10 voters in Michigan on Tuesday were Republicans. The state's primary rules do allow others to vote, and around 10% of all voters identified themselves as Democrats.
one in four said they had made up their mind in the past few days
more than 40% supported the government bailout of the automotive industry
most voters said the economy was their top priority
in both Michigan and Arizona, about half of voters said they "strongly" backed who they had voted for.
Six out of 10 Michigan primary voters described themselves as "conservative" - the lowest proportion of conservative voters in primaries so far.

Once polling closes, live updates can be found at the following maps:

Michigan:

[7]