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

Question: What happened to him after the 1948 election?
Self-contained rewrite: What happened to P. W. Botha after the 1948 election?