By Dave Graham and Miguel Gutierrez MEXICO CITY (Reuters) – Mexico's ruling Institutional Revolutionary Party (PRI) is ready to support an opposition proposal to increase a planned tax on junk food, the party's leader in the Senate said on Wednesday. Last week, the lower house of Congress approved a planned fiscal reform containing a measure to impose a 5 percent tax on junk food, and the Senate is expected to approve the reform by the end of the month. …
