By Scott Murdoch SYDNEY, Dec 11 (Reuters) - Westpac non-executive director Peter Nash was reelected to the bank's board on Thursday, surviving a sizeable investor backlash over his ties ​to the troubled Australian Securities Exchange. About 40% of investors voted against his reelection as ‌a board director at the annual meeting of Australia's second-largest bank by market value, the results lodged with the stock ‌exchange showed. Nash needed at least 50% support, and the high protest vote was the secon ...