The ruling Liberal Democratic Party has the highest support rate ahead of the July 10 upper house election, a Kyodo News survey showed Sunday. In a nationwide telephone survey conducted on Saturday and Sunday, 27.3 percent of respondents said they will vote for the LDP led by Prime Minister Fumio Kishida when casting ballots under proportional representation, followed by the Japan Innovation Party with 7.7 percent and Constitutional Democratic Party of Japan with 7.0 percent. Some 42 percent of respondents said measures to boost the economic recovery and cope with price rises are the most impo…