Independent presidential candidate Robert F. Kennedy Jr. is chipping away toward the goal of being on the ballot in states across the country‚ increasing the chances he will influence the outcome of the White House race. Mr. Kennedy has cleared the bar in Utah and recently collected the signatures needed to appear on the ballot in New Hampshire. He has also decided to work smarter‚ not harder‚ in a half-dozen states — California‚ Delaware‚ Hawaii‚ Mississippi‚ North Carolina and Texas —...