Dr Mahathir:"We should not choose and trust people who like to hop from one party to another like that."
He said the country had progressed from the BN's administration and because its leaders worked hard for the country's development and not for personal interests.
"When we develop the country, everyone will benefit and this only the BN has proven to be able to do."
On PKR candidate in the by-election, Zaid Ibrahim, he said the former minister could be likened to a frog.
"When he was in Umno, he became a minister, then he joined the opposition and now he's their candidate for the by-election.
"We should not choose and trust people who like to hop from one party to another like that.
"He (Zaid) doesn't gamble but he has horse races. I too have horses but they are not horse races. He admitted having horse races but said he didn't gamble. I don't understand this," Mahathir said.