US President Joe Biden announced on Sunday that he is stepping aside as the Democratic Party’s candidate in the November election. Here is his letter in full: “My fellow Americans, Over the past three and a half years, we have made great progress as a Nation. Today, America has the strongest economy in the world. We’ve made historic investments in rebuilding our Nation, in lowering prescription drug costs for seniors, and in expanding affordable health care to a record number of Americans. We’ve provided critically needed care to a million veterans exposed to toxic substances. Passed the first…