2 questions about a passage
【How do you explain to a President, who has all the power, that his Vice President has become virtually impotent in his home state? You don't explain it. He wouldn't understand; he would suspect you of evasion. Johnson had been running a broken field since birth, but his current problems were authentic. They arose in part from his stance as a public figure. Like Kennedy in New England he had burst upon the national scene as maverick, a vote-getter who made no secret of his lack of sympathy for the advocates of doctrinaire solutions to complex issues. That moderation was the secret of his strength at the polls. Yet he paid a price for it in the councils of his party. Because he clung to the middle of the road he had failed to inspire any deep loyalty from either the Democrats’ liberal or conservative wings—and was therefore regarded by both as an outsider.】
1. what does "Johnson had been running a broken field since birth,"mean?
2.what does "doctrinaire solutions to complex issues" indicate to?