Both states have been criticized as unrepresentative of the country given their size and lack of racial diversity. Iowa — population 3 million — is 95 percent white; New Hampshire — population 1.3 million — is 96 percent white. Democrats tried to inject more diversity into the process by adding early contests in Nevada and South Carolina, but Iowa and New Hampshire moved even earlier.
The system became so scrambled last year that New Hampshire Secretary of State Bill Gardner was prepared to move the primary into December to keep ahead of other states that scheduled their own early primaries and caucuses. If anything, the front-loaded calendar made Iowa and New Hampshire more important.
Note that the latter part of the article discusses the argument that New Hampshire and Iowa more closely examine the candidates, weeding out the candidates without enough "substance." How does the median voter model undermine this service?