Published: Mar 09, 2011 5:36 PM EST
Updated: Mar 09, 2011 2:36 PM EST

WASHINGTON - National Public Radio President and CEO Vivian Schiller is not saying whether she offered to quit or was forced out by the organization's board of directions.

Schiller told The Associated Press on Wednesday that she resigned after a discussion with the board. She stepped down a day after a conservative activist posted a video showing an NPR executive calling tea party Republicans xenophobic and racist.

Schiller says NPR is facing the most serious threat yet to its congressional funding. She says there's extraordinary pressure on Congress to make cuts and that the remarks by Ron Schiller were outrageous and unfortunate at such a critical time.

(Copyright 2011 by The Associated Press. All Rights Reserved.)