It would be a hard and difficult campaign, but not an impossible one.

This particularly difficult campaign was recognized in the form of the Shield.

He would not have come unprepared for a difficult campaign.

His only difficult campaign came in 1962, at age 85, when he defeated a young conservative.

This was a difficult and costly campaign for both sides.

"I think this is going to be a very, very difficult campaign."

He began a new, more difficult political campaign to form a stable coalition government.

It would be an amusing diversion, but not, he thought, an especially difficult campaign.

"I will also do what I can to help bring us together after this long and difficult campaign."

"These are tough times," she said, "and I think it will be a difficult campaign."