By LOLITA C. BALDOR, Associated Press WASHINGTON (AP) — China is expanding its nuclear force, has increased military pressure against Taiwan and has strengthened its ties with Russia over the past year, according to a Pentagon report Wednesday that details actions accelerating key areas of conflict with the United States. The report, however, also notes that the recent rash of corruption allegations within China’s powerful Central Military Commission, which oversees the People’s Liberation Army, is hurting Beijing’s military growth and could slow its campaign to modernize. The impact, said a senior defense official, is a bit of a mixed bag because while there has been progress in some programs, China has slid back in others. The official, who spoke on condition of anonymity to describe the U.S.