New York Times: “The political action committee, called Win It Back, has close ties to the influential fiscally conservative group Club for Growth. It has already spent more than $4 million trying to lower Mr. Trump’s support among Republican voters in Iowa and nearly $2 million more trying to damage him in South Carolina.”
“But in the memo — dated Thursday and obtained by The New York Times — the head of Win It Back PAC, David McIntosh, acknowledges to donors that after extensive testing of more than 40 anti-Trump television ads, ‘all attempts to undermine his conservative credentials on specific issues were ineffective.’”
“The memo will provide little reassurance to the rest of the field of Mr. Trump’s Republican rivals that there is any elusive message out there that can work to deflate his support.”