In 1842, Colfax became the editor of the pro-
Whig South Bend Free Press, owned by
John D. Defrees. When Defrees moved to
Indianapolis the following year and purchased the
Indiana Journal, he hired Colfax to cover the
Indiana Senate for the
Journal. In addition to covering the state senate, Colfax contributed articles on Indiana politics to the
New York Tribune, leading to a friendship with its editor,
Horace Greeley. In 1845, Colfax purchased the
South Bend Free Press and changed its name to the
St. Joseph Valley Register. He owned the
Register for nine years, at first in support of the Whigs, then shifting to the newly established Republican Party.