stylistic:tone
Harmless error and standards of review

Where a defendant fails to object to the inadmissible evidence at the time of trial or fails to specify that she or he is objecting on Confrontation Clause grounds, the reviewing court will sometimes only review for more substantial errors such as "plain error" or an error that results in a manifest injustice. Federal Circuit Courts of Appeal review unobjected to Confrontation Clause errors for plain error. State courts vary widely in their requirements for reviewing Confrontation Clause errors, but many review for either plain error, manifest injustice, or another similar standard. In many instances, courts reverse on Confrontation Clause grounds without analyzing whether an error is harmless. The most common reason for omitting such an analysis is the government's failure to raise harmlessness as an issue. Generally, defendants do not raise harmlessness unless the government does so.