And quality is something we can never let up on again.
You are not going to sneak in a quick call at a stoplight and let up on the brake without realizing it, or step on the gas without looking when the light turns green.
Mr. Romney's campaign and the well-financed "super PAC" supporting him indicated they would not take Tuesday's results as an opening to let up on their fellow Republicans; both were already pouring advertising dollars into future primary and caucus states, particularly Mississippi and Alabama.
"It would be a shame if we let up on our last patrol and somebody got hurt".
(For a cleaner brake just let up on the up arrow and let the car slow on its own).
"We never let up on this movie for one minute".
"With Obamacare on the ropes, there will be a temptation for opponents to let up on their criticism, and to try to appear constructive, or at least responsible.... My advice, for what it's worth: Resist the temptation.
We also can't let up on a firm insistence to our right to not be shoved out in the cold to survive on our own, but rather to be included in the national agenda.
But on Wednesday, Mr. Gingrich, a former House speaker, did not let up on Mr. Romney's record at Bain Capital.
"We will not let up on jobs as a priority until unemployment returns to normal levels".
(Perhaps he will let up on him now that Michael Vick is one of his back-ups).
