Philippine Vice President Sara Duterte said Friday that her lawyers were preparing for a legal battle in her upcoming impeachment trial but refused to say if resignation was an option so she could preempt a possible conviction that would bar her from running for president in the future.

MANILA (Reuters) - Philippine Vice President Sara Duterte said on Friday she had been preparing since last year for impeachment and would welcome on her defence team her firebrand father, former President Rodrigo Duterte, if interested to join.

Philippine President Ferdinand Marcos Jr on Thursday distanced himself from the impeachment of his estranged Vice President Sara Duterte, saying the executive branch of government cannot have a hand in it.