Conversation so far:
What type of political activities did Murdoch do in Australia?
Murdoch threw his growing power behind the Australian Labor Party.
What did Murdoch do after growing power behind Australian Labor Party?
Murdoch had already started his short-lived National Star newspaper in America, and was seeking to strengthen his political contacts there.
Did he receive any political contacts there?
seeking to strengthen his political contacts there.

Question: What did he do with his political contacts there?
Self-contained rewrite: What did Rupert Murdoch do with his political contacts in America?