WASHINGTON—U.S. President Joe Biden will meet at the White House with Afghan President Ashraf Ghani and chairman of Afghanistan’s High Council for National Reconciliation Abdullah Abdullah on Friday to discuss U.S. troop withdrawal amid a surge in fighting between Afghan forces and the Taliban across the country. In their first face-to-face meeting, Biden will seek to reassure Ghani and Abdullah of U.S. support for the Afghan people including diplomatic, economic and humanitarian assistance, the White House said in a statement. Biden will also repeat his pledge to ensure that the country never becomes a safe haven for terrorist groups. “The visit by President Ghani and Dr. Abdullah will highlight the enduring partnership between the United States and Afghanistan as the military drawdown continues,” the White House said. Since Biden’s decision in April to pull out all U.S. troops before Sept. 11 to end America’s longest war after nearly 20 years …