Conversation so far:
When did P. W. Botha enter Parliament?
1948
What happened to P. W. Botha after entering Parliament?
In 1958 Botha was appointed Deputy Minister of Internal Affairs by Hendrik Verwoerd.
When did P. W. Botha win the the 1948 election?
1948
Who was P. W. Botha's opponent in the 1948 election?
JP Marais
What happened to P. W. Botha after the 1948 election?
In 1958 Botha was appointed Deputy Minister of Internal Affairs by Hendrik Verwoerd.

Question: What was his next position after being appointed as the Deputy Minister of Internal Affairs?
Self-contained rewrite: What was P. W. Botha's next position after being appointed as the Deputy Minister of Internal Affairs?