Help Separating part of a cell into a new column

Hello,

I have a fun one that I would love some help with. Currently my sheet looks like this:

Column A

World Leader
Obama (usa)
Blair (England)
Churchill (Englad)
Chirac (France)

I need a formula that will take the country in parenthesis and move it to the adjacent column next to the world leader's name. For example:

Column A Column B
World Leader Country
Obama usa
Blair England
Churchill England
Chirac France

I have over 1000 historical leaders in my sheet. Any help is super-appreciated! Thanks!