Here are a few resources.
The New York Times is an important newspaper. It is sometimes called "the newspaper of record" or "the gray lady". All newspapers have a bias; the NYT is usually considered center-left. If you find a NYT article that you want you may hit a paywall (i.e., you have to pay for the article); if this happens send me the info and I can retrieve it for you through my NYT account.
Chronicling America is a project created by the Library of Congress that has digitized many US newspapers from 1789-1925. The search engine is powerful.