Cliff Owen / AP

In an interview with The Arizona Republic Thursday, McCain explained that he's concerned about the Trump administration's approach to immigration reform:

"I'm not against a border wall, OK, but go to China and you'll see a border wall there. We need technology, we need drones, we need surveillance capabilities and we need rapid-reaction capabilities... But to think that a wall is going to stop illegal immigration or drugs is crazy."

McCain also said he supports a merit-based system, but worries about how low-skilled workers, such as those who pick strawberries in fields across America, would survive under the Cotton-Perdue bill that Trump helped introduce Wednesday.

"I think you have to consider that we do want high-tech people, but we also need low-skilled people who will do work that Americans won't do," McCain said. "I wouldn't do it."

Go deeper

GAO finds Chad Wolf, Ken Cuccinelli are ineligible for top DHS roles

Photo: CQ-Roll Call, Inc via Getty Images

Acting Homeland Security Secretary Chad Wolf and his acting deputy Ken Cuccinelli are ineligible to be serving in their positions, the Government Accountability Office (GAO) decided in a report released Friday.

Why it matters: While the finding has no immediate power, it could be important evidence in litigation over policies enacted under Wolf and Cuccinelli's leadership, said America's Voice's Ur Jaddou, who served as chief counsel to U.S. Citizenship and Immigration Services (USCIS) under President Obama.

The many divisions over Trump's methane rollback

Illustration: Rebecca Zisser/Axios

EPA's decision to cut regulation of methane is laying bare an oil-and-gas industry divide and setting the stage for political battles this fall and beyond.

Why it matters: Methane is an extremely powerful greenhouse gas and the industry is a key emissions source.

Kushner says Trump didn't promote false Kamala Harris birtherism theory

White House senior adviser Jared Kushner told "CBS This Morning" on Friday that he does not believe President Trump promoted a baseless claim that Sen. Kamala Harris is ineligible to be vice president.

Driving the news: During a press briefing on Thursday, Trump did not question the veracity of a Newsweek op-ed that inaccurately claimed Harris may be ineligible for the office due to her parents' naturalization status at the time of her birth. Harris is an American citizen and was born in Oakland, Calif.