Complex sentence: As governor, in 2011, he signed a law that would make illegal immigrants brought to the United States as children eligible for in-state college tuition, and in 2012, he signed a law to legalize same-sex marriage in Maryland.
Split into simpler sentences: As governor, in 2011, he signed a law that would make illegal immigrants brought to the United States as children eligible for in-state college tuition. In 2012, he signed a law to legalize same-sex marriage in Maryland.