Republicans are doubling down on accusations that Gov. Tim Walz’s (D-MN) long history with China presents political liabilities for the Democratic vice presidential candidate to take on the foreign adversary should he be elevated to the White House.

As a 1989 college graduate and Army National Guard member, Walz embarked to China through a Harvard University-affiliated program to teach English and U.S. history and later operated a business organizing trips for U.S. students. Walz has visited the country 30 times over the decades by his own estimation, and he went back for his honeymoon with his wife.