Complex sentence: Conservative commentators were critical of what they viewed as Obama's support for big government; fact-checking organizations, and commentators were critical of what they viewed as misrepresentations of Obama's speech by the Romney campaign.
Split into simpler sentences: Conservative commentators were critical of what they viewed as Obama's support for big government. Fact-checking organizations and commentators were critical of what they viewed as misrepresentations of Obama's speech by the Romney campaign.