The question asks about "most" Protestants. I would suggest that no one has done enough research on that particular question to answer what "most" believe. It is quite evident that there are many on both sides of this issue. So, apart from some scientifically conducted poll, no one is going to be able to answer the "most" part of the question definitively.
The research of what respective denominations believe is a bit easier. For instance, I will tell you that the various congregations in the Methodist/Wesleyan family are going to recognize the sovereignty of God, but believe God exercises his sovereignty by granting mankind genuine freewill to make choices, including the ability to reject God's offer of salvation if one so desires. As for other denominations, I'll leave that to the OP to research on his own.
In addition, here is what I find being taught at some of the larger independent congregations in the country:
The following is part of the
statement of faith[/url] of Southeast Christian Church (Louisville, KY) the 5th largest protestant congregation in the country.
Willow Creek Community Church (South Barrington, IL), with Bill Hybels as pastor has the following in their statement of what they believe:
Of course, even though there are more and more people attending megachurches, the vast majority of Christians in the USA still attend congregations of 50 people or less. Many of them are of no denominational affiliation, and that is what makes answer the question about "most" so hard, because without a poll we really don't know.