Nebraska Revised Statutes Chapter 50. Legislature § 50-1516. Election contest; grounds

(a) For misconduct, fraud, or corruption on the part of an election commissioner, a county clerk, an inspector, a judge or clerk of election, a member of a counting or canvassing board, or an employee of the election commissioner or county clerk sufficient to change the result;

(b) If the respondent member has given or offered to any voter or an election commissioner, a county clerk, an inspector, a judge or clerk of election, a member of a counting or canvassing board, or an employee of the election commissioner or county clerk any bribe or reward in money, property, or thing of value for the purpose of procuring his or her election;

(c) If illegal votes have been received or legal votes rejected at the polls sufficient to change the results;

(d) For any error of any board of canvassers in counting the votes or in declaring the result of the election if the error would change the result;

(e) If the respondent member is in default as a collector and custodian of public money or property; or

(f) For any other cause which shows that another person was legally elected.