Some Minnesota political party leaders are turning up pressure on legislators to legalize same-sex marriage in the state this year. “This is about what kind of state we want for the future,” Ken Martin, chair of Minnesota’s DFL Party, said Wednesday. “What kind of statement do we want to make when a whole swath of society is treated like second-class citizens? We know the freedom to marry is a critical step to a better Minnesota.” Legislators appear to be weeks away from a vote on a measure to legalize same-sex marriage, which would make the state the 10th to authorize such unions. It is not clear that its supporters have the necessary votes in the Legislature, so several party leaders were applying an extra bit of pressure as legislators wrestle with the issue.