Incumbent presidents generally try to cast their re-election contest as a choice between the imperfect but well-meaning and effective occupant of the White House and the far worse alternative offered by the rival party.
Challengers, on the other hand, try to frame a presidential race as a referendum on the sitting president whose record nearly always contains missteps, or who can be blamed for trouble in the economy or elsewhere.
In short, whether it's the president or the challenger, the way the game is played requires each to define the opposition as well as himself.
On the plus side, the ADP National Employment Report issued this morning estimates there were 209,000 jobs added to private employers' payrolls in March. And ADP's data often are something of a predictor for what the Bureau of Labor Statistics will have to say when it issues its monthly numbers. Those March figures are due on Friday at 8:30 a.m. ET.
Life is not back to normal for everybody in the town of Lancaster, Texas. A state of emergency has been declared there, and the city of Arlington, as well, following yesterday's storms in the Dallas area.
Nine national medical groups are launching a campaign called Choosing Wisely to get U.S. doctors to back off on 45 diagnostic tests, procedures and treatments that often may do patients no good.
Many involve imaging tests such as CT scans, MRIs and X-rays. Stop doing them, the groups say, for most cases of back pain, or on patients who come into the emergency room with a headache or after a fainting spell, or just because somebody's about to undergo surgery.
Former Arapahoe County (Colo.) sheriff Patrick Sullivan, who back in December was charged with trying to trade methamphetamine for sex with a man, "pleaded guilty on Tuesday to charges of meth possession and soliciting prostitution," Denver's KUSA-TV reports.
After going 0-for-3 in Tuesday's presidential primaries, a defiant Rick Santorum dismissed calls to drop out and predicted he'll win the next contest in his home state of Pennsylvania on April 24.
He'll have to — and not because it would put the former Pennsylvania senator on a path to defeat front-runner Mitt Romney, who has been racking up delegates and is increasingly seen as the inevitable nominee.
A loss in Pennsylvania, where recent polls show Santorum is weakening, would "destroy the rationale for him continuing," says Pennsylvania pollster G. Terry Madonna.