Actually It's 61 percent of Americans who want abortion banned or strongly restricted. Scott Brown would not have a shot at the nomination in a scenario such as that. Rubio should fight to the convention.
You're wrong.
http://www.gallup.com/poll/1576/abortion.aspx
Read your own link.
About 1/3 of the way down the page, under the question "(If certain circumstances) Do you think abortion should be legal in most circumstances or only in a few circumstances?"
The combined responses have 61% for abortion illegal in all or legal in only a few circumstances.