WASHINGTON — Sen. John McCain said he has serious concerns about the current and planned U.S. military presence in the Pacific and said operations in Iraq and Afghanistan “may be mortgaging our future.” The comments came as Adm. William J. Fallon, Commander of U.S. Pacific Command and Army Gen. Leon J. LaPorte, Commander of United States Forces Korea, testified before Congress on Tuesday to discuss their operational plans related to the 2006 defense budget. McCain called the Middle East operations “legitimate demands” but said he worries that not enough attention is being paid to the military’s ability to react to...