Two Christian groups sent a letter to Politico demanding an apology for reporter Heidi Przybyla's comments about Christians

Politico reporter Heidi Przybyla made the comments during an appearance on MSNBC last week .

The Family Research Council and Catholic Vote called her comments "deeply disturbing" The groups say she has a "pervasive bias" that prevents her from covering religious issues.

Politico must confirm that such offensive comments have no place within its organization, the groups wrote.