Prospective Cover Letter Do I Need A Cover Letter?

Do I need a cover letter? - prospective cover letter

Do you have an interview tomorrow for a new job and was curious if you must enclose a letter with my resume. The manager said on the phone who do not bring you anything, because everything that you should have online application. Nevertheless, I will continue my resume, letters of recommendation, the last post reviews and references, but I think to take the letters to potential employers even before consideration for an interview. What are your feelings about this?