Rick Santorum is trailing Mitt Romney significantly in Wisconsin, according to a new poll by Marquette Law School. The poll has Romney up by eight points a week out from the April 3rd primary. From Marquette Law School:

In the Republican presidential primary on April 3rd, would you vote for Newt Gingrich, Ron Paul, Mitt Romney, or Rick Santorum?

Gingrich                5
Paul                       11
Romney               39
Santorum            31
Don’t know (v)   12
Refused (v)           1

This is a serious problem for the Santorum campaign. The sense of Romney’s inevitability is growing on an almost daily basis. A recent CNN poll found that 39 percent of the Republican base think Santorum should drop out.

For Santorum to have even a slim chance of winning the nomination, he needs something to shake up the race and change the current trajectory that has Romney securing the nomination. He needs to prove he can start beating Romney outside of the bible belt. Wisconsin  is one of the few potential upcoming opportunities for Santorum to prove he can beat Romney all over the country. If Santorum doesn’t win Wisconsin, it will become much tougher for him to continue to make the case that he can stop Romney.