Trump wins the North Dakota caucuses and resumes the nomination in March

Donald J. Trump defeated Nikki Haley in the Republican caucuses in North Dakota on Monday, according to The Associated Press, as he resumed his march to the nomination following a victory for Ms. Haley in the Washington, D.C., primary the day before.

The contest resumed Ms. Haley’s string of defeats in the nominating contests to date, most by double-digit margins, starting with the Iowa caucuses in January and continuing through the Michigan caucuses last Tuesday.

Ms. Haley, a former governor of South Carolina, briefly interrupted her losing streak with a victory in the nation’s capital, winning about 63 percent of the vote on Sunday. The contest was small — just over 2,000 Republicans voted in the predominantly Democratic city — but awarded Ms. Haley 19 delegates, nearly doubling her total.

But it is unclear whether Ms. Haley can win any of the upcoming state competitions. North Dakota was the last state to hold a nominating contest before Super Tuesday, when 15 states will hold Republican primaries and caucuses that will split about a third of all delegates. Mr. Trump leads by wide margins in polls, both nationally and in states where voting takes place on Tuesday. Recent Texas Pollsfor example, shows him with about 80 percent support.

Although Trump cannot clinch the nomination on Super Tuesday, a strong performance could bring him very close to the majority of delegates he needs. If Ms. Haley does not win some states soon, Trump could secure the nomination by the end of March.