What is the scope of cross-examination in civil litigation?

The trial court's decision regarding the scope of cross-examination is reviewed for an abuse of discretion. Bonanno, 852 F.2d at 439. " 'When the trial court excludes evidence tending to impeach a witness, it has not abused its discretion as long as the jury has in its possession sufficient information to appraise the biases and motivations of the witness.' " United States v. Lopez, 885 F.2d 1428, 1438 (9th Cir.1989), cert. denied, 493 U.S. 1032 (1990) (quoting United States v. Kennedy, 714 F.2d 968, 973 (9th Cir.1983), cert. denied, 465 U.S. 1034 (1984)).