Obama responds to Clinton's spot with a 30-second Indiana ad quoting anti-Clinton NYT editorial after Pennsylvania win.
“Her hometown newspaper says she's taking the low road - her attacks do nothing but harm."
Watch it above. Read script here.
Clinton spokesman Singer responds: "Considering that Senator Obama is now airing his fourth negative ad in six days, it's clear that his closing message is focused on attacking Senator Clinton to cover up for the fact that he has no plan to reduce gas prices this summer."
Clinton 30-second spot airing in both May 6 states criticizes Obama on the gas tax, uses first-person accounts of people struggling to pay at the pump.
"What has happened to Barack Obama? ...He is attacking Hillary's plan to give you a break on gas prices because he doesn't have one."
Watch it above. Read script here.

