We asked PostOpinions columnists, bloggers and editors who would win Tuesday night’s Iowa caucuses and why. Read all the PostOpinions predictions, as well as analysis of Iowa from Richard Cohen, Michael Gerson, Kathleen Parker, Eugene Robinson, and Marc Thiessen.

In the last week, Iowa Republicans  have gotten serious about their presidential choices, separating the wheat from the chaff. Unfortunately for Rep. Michele Bachmann (R-Minn.), Newt Gingrich, and Texas Gov. Rick Perry, Iowa voters on Tuesday night will relegate them to the discard pile. Expect Bachmann to finish last, Gingrich to take fifth and Perry to end in fourth, well behind the trio of frontrunners.

The top three finishers will be closely bunched. Mitt Romney, who put all the pieces together in the nick of time, will narrowly capture first place with about 25 percent. Next will be the surging Rick Santorum with approximately 22 percent, as he continues to consolidate evangelical support. In third will be an increasingly defensive Rep. Ron Paul (R-Tex.) at around 19 percent. The race then becomes a three-man contest with Romney the heavy favorite.