By Timour Azhari BAGHDAD (Reuters) – A powerful Iraqi faction that led dozens of attacks against U.S. forces since October was pushed to announced a suspension of attacks through pressure from Tehran and ruling Iraqi parties who felt the faction had crossed a red line, four sources said. Washington has pointed to Iran-aligned armed group Kataib Hezbollah as the perpetrator of Sunday’s drone attack on the Jordanian-Syrian border that killed three U.S. troops and injured dozens more, and has vowed to respond forcefully. Kataib Hezbollah on Tuesday announced it was stopping all attacks on U.S. fo…