The United States aims to cut Iran’s crude exports by about 20 percent to below 1 million barrels per day (bpd) from May by requiring importing countries to reduce purchases to avoid U.S. sanctions, two sources familiar with the matter told Reuters. U.S. President Donald Trump eventually aims to halt Iranian oil exports and thereby choke off Tehran’s main source of revenue. Washington is pressuring Iran to curtail its nuclear program and stop backing militant proxies across the Middle East. The United States will likely renew waivers to sanctions for most countries buying Iranian crude, including the biggest buyers China and India, in exchange for pledges to cut combined imports to below 1 million bpd. […]