WASHINGTON (AP) – President Donald Trump appeared headed for all-but-certain impeachment acquittal as senators prepared on Friday to reject efforts to call more witnesses and moved to start bringing a close to only the third impeachment trial in American history. The timing of a final vote on Trump was still uncertain. But the outcome was increasingly clear after a key Republican, Sen. Lamar Alexander of Tennessee, announced he didn’t need to see or hear more testimony. He said the Democrats had proved their case, that Trump abused power and obstructed Congress, but he did not think Trump’s actions rose to the impeachable level. Eager for acquittal, the president and his allies in the Republican majority are brushing past new revelations from John Bolton, his former national security adviser, as well as historic norms that could make this the first Senate impeachment trial without witnesses. They resisted any efforts by Democrats to keep the proceedings going for weeks. Voting on the witness question was expected late Friday after hours of debate, with other votes stretching well into the evening. The timing was not set. Democrats warned the outcome won’t mean a true acquittal for Trump but a cover-up.