Just a month and a half away from national elections, Pakistan’s powerful military establishment has mounted a fearsome campaign against its critics in the news media, on social networks, and in mainstream political movements.

It is all adding up: journalists abducted or threatened, major news outlets blocked, sympathetic views toward the civilian governing party, the Pakistan Muslim League-Nawaz, censored or punished.

Interviews with journalists and political analysts in recent days have been dominated by concerns that a military campaign of intimidation and crackdown on dissent is intensifying ahead of the vote — and nearly unanimously, none dared discuss it on the record.

The latest alarm came with the abduction of a newspaper columnist and prominent critic of the military, Gul Bukhari, by armed men late Tuesday in the eastern Pakistani city of Lahore. Ms. Bukhari was being driven to appear on a late-night talk show on Waqt News when the car was stopped in a military cantonment in the city. She was hauled off and the driver was beaten, the station said.