Likely 2016 presidential candidate Scott Walker refused to say Wednesday whether he believes in the theory of evolution, dodging that question and several others after delivering a speech about global trade in London.

“I’m going to punt on that one as well,” said Wisconsin’s Republican governor when asked about evolution at the prestigious Chatham House think tank. “That’s a question a politician shouldn’t be involved in one way or the other.”

Walker, an evangelical Christian and the 47-year-old son of a Baptist preacher, also declined to answer questions about how the West should combat the Islamic State group, whether the U.S. should arm forces in Ukraine and whether it’s wise for Great Britain to remain in the European Union.

“I don’t think it’s polite to respond on policy in the United States when you’re in a foreign country,” Walker said when asked about Islamic State. “That’s certainly something I’ll answer in the future.”

The speech marked Walker’s only planned public event during a four-day trade mission to the United Kingdom that wraps up Friday. He also has met privately with British Prime Minister David Cameron and other officials.

Walker’s campaign issued a statement later Wednesday in response to questions about his position on evolution. “Both science and my faith dictate my belief that we are created by God,” Walker said. “I believe faith and science are compatible, and go hand in hand.”

His campaign spokesman did not immediately respond to a follow-up question on whether that statement meant Walker believed in evolution or creationism.