Hillary Clinton says she won't comment on emails sent by former Secretary of State Colin Powell attacking her for "hubris."
Clinton was speaking on Tom Joyner's morning radio show.
She said: "I have a great deal of respect for Colin Powell and I have a lot of sympathy for anyone whose emails become public."
The emails were leaked to a website which has been alleged to be an outlet for hackers tied to the Russian intelligence groups.
Clinton said the email leak underscores efforts by the Russians to try to interfere with U.S. elections. She said she's "increasingly concerned" by what she called rival Donald Trump's "alarming closeness with the Kremlin." Trump has frequently praised Russian leader Vladimir Putin.