In the internet age, we are all journalists and therefore we should all have the right not to reveal our sources for what we publish.
This will actively encourage corruption.
"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances."
The implied distinction between freedom "of" the press and freedom "for" the press is sophistry. See http://en.wikipedia.org/wiki/Freedom_of_the_press_in_the_Uni... for several important examples demonstrating this.