"This has been one of the strangest weeks I've ever had in Washington," Wallace said on "Fox News Sunday." "As soon as we listed Ted Cruz as our featured guest this week, I got unsolicited research and questions, not from Democrats, but from top Republicans to hammer Cruz."
Palin responded on Twitter, writing: "@FoxNewsSunday Keep it TRULY fair & balanced. Release the GOP names encouraging you to trash @SenTedCruz. No more anonymous sources."
Wallace hosted Cruz to discuss the Republican bill to defund Obamacare in order to avoid a government shutdown, which has almost no chance of passing the Senate. The initiative has earned the senator the ire of fellow Republicans. Cruz has called for filibustering the bill, which he supports, in the Senate to prevent Democrats from amending it.