Kentucky Gov. Matt Bevin, left, chats with Wisconsin Gov. Scott Walker at a special session called "Collaborating to Create Tomorrow's Global Economy" at the second day of the National Governors Association meeting Friday, July 14, 2017, in Providence, R.I. (Ryan Remiorz/The Canadian Press via AP)
Canada's Prime Minister Justin Trudeau, right, speaks with Wisconsin Gov. Scott Walker during a special session called "Collaborating to Create Tomorrow's Global Economy" at the second day of the National Governors Association meeting Friday, July 14, 2017, in Providence, R.I. (Ryan Remiorz/The Canadian Press via AP)
Canada's Prime Minister Justin Trudeau, right, meets with Wisconsin Gov. Scott Walker during a special session called "Collaborating to Create Tomorrow's Global Economy" at the second day of the National Governors Association meeting Friday, July 14, 2017, in Providence, R.I. (Ryan Remiorz/The Canadian Press via AP)
Oklahoma Gov. Mary Fallin leads a discussion on jobs and education at the National Governors Association convention on July 12 in Nashville, Tennessee. (Associated Press)
Montana Gov. Steve Bullock, left, and Utah Gov. Gary Richard Herbert, center, listen as Vice President Joe Biden speaks at the National Governors Association convention Friday, July 11, 2014, in Nashville, Tenn. (AP Photo/Mark Humphrey)
Arizona Gov. Jan Brewer waits for the arrival of President Barack Obama to speak to members of the National Governors Association in the State Dining Room of the White House in Washington, Monday, Feb. 24, 2014. (AP Photo/Jacquelyn Martin)
Arizona Gov. Jan Brewer walks towards the West Wing of the White House in Washington, Monday, Feb. 24, 2014, after the National Governors Association met with President Barack Obama. (AP Photo/Charles Dharapak)
Connecticut Gov. Dannel Malloy, center, speaks to reporters outside the White House in Washington, Monday, Feb. 24, 2014, following a meeting between President Barack Obama and members of the National Governors Association (NGA). From left are, Maryland Gov. Martin O'Malley, NGA Chair, Oklahoma Gov. Mary Fallin, Malloy, and Vermont Gov. Peter Shumlin. (AP Photo/Charles Dharapak)
President Barack Obama, right, and Gov. Mike Pence, R-Ind., toast during a dinner for the National Governors Association in the State Dining room of the White House on Sunday, Feb. 23, 2014, in Washington. (AP Photo/ Evan Vucci)
President Barack Obama toasts after delivering remarks during a dinner for the National Governors Association in the State Dining room of the White House on Sunday, Feb. 23, 2014, in Washington. (AP Photo/ Evan Vucci)
Louisiana Gov. Bobby Jindal, center, speaks to reporters outside the White House in Washington, Monday, Feb. 24, 2014, following a meeting between President Barack Obama and members of the National Governors Association (NGA). From left are, Maryland Gov. Martin O'Malley, NGA Chair, Oklahoma Gov. Mary Fallin, Jindal, Vermont Gov. Peter Shumlin, and Connecticut Gov. Dannel Malloy. (AP Photo/Charles Dharapak)