RADNOR, Pa.--(BUSINESS WIRE)--Lincoln Financial Group (NYSE: LNC) today reported net income for the second quarter of 2015 of $344 million, or $1.35 per diluted share available to common stockholders, compared to net income in the second quarter of 2014 of $398 million, or $1.48 per diluted share available to common stockholders. Second quarter income from operations was $371 million, or $1.46 per diluted share available to common stockholders, compared to $394 million, or $1.47 per diluted sha