2012 Republican Presidential Candidates Paths to Victory

Find out what each candidate must do to win the Republican nomination for President in 2012. Which are must-win states for which candidates? What are their strategies for winning? Includes the following candidates:

Top-Tier Candidates:

Michele Bachmann
Ron Paul
Rick Perry
Mitt Romney

Lower-Tier Candidates:

Herman Cain
Newt Gingrich
Jon Huntsman
Rick Santorum