Presidential race marches on with many candidates polling 2% or less
![Presidential race marches on with many candidates polling 2% or less](http://bloximages.chicago2.vip.townnews.com/qctimes.com/content/tncms/assets/v3/editorial/8/76/876cb66f-977a-58de-a3d5-bcd25c2765fa/55fa421310639.image.jpg?resize=300%2C192)
DES MOINES — There is a historically large field of candidates running for president this year. But a significant number of those candidates have been virtually invisible in the polls. Better …