Washington (AFP) – US central bankers opened their two-day policy meeting Tuesday amid a blistering inflation surge that has ignited predictions the Federal Reserve will approve the biggest interest rate hike in more than 27 years. Fed Chair Jerome Powell has signaled that policymakers were poised to implement another half-point increase in the benchmark borrowing rate this week and another next month. But a growing number of voices are now calling for a more aggressive three-quarter point hike in response to the big, unexpected jump in the consumer price index in May, which defied widespread …