By Tom Balmforth and Nandita Bose KYIV, Ukraine/WASHINGTON (Reuters) – The United States will not provide the F-16 fighter jets that Ukraine has sought in its battle against Russia, President Joe Biden said, as Russian forces claimed a series of incremental gains in the country’s east. Asked if the United States would provide the jets, Biden told reporters at the White House on Monday, “No.” Ukraine planned to push for Western fourth-generation fighter jets such as the F-16 after securing supplies of main battle tanks last week, an adviser to Ukraine’s defence minister said on Friday. “The nex…