The article in Politico suggests a couple of possible reasons for the celebrity involvement in the 2012 election like for one Barack Obama's star power and liberal appeal plus because of the social media boom which makes the communication much, much easier. Finally this kind of communication with the stars also works well.
They over fished and attacked the Indians
Some people believed that immigration shouldn't happen. They believed people should stay where they're born. <span />
The completion of the Transcontinental Railroad greatly affected companies that made products in that it made it far easier for them to transport their goods over long distances to markets, which greatly increased profits and output.