carokinsellaireland
Overstayed your visa
Once you have filled the DS 160 Ireland online application form for visiting the US and have overstayed your permitted time of visiting the US, or have spent time in the U.S. without any authorization, then this might bar you from making your entry to the US again.
Source: http://www.imfaceplate.com/Carokinsellaireland/top-7-reasons-to-denied-entry-to-the-usa-with-visa
Have Criminal Record
If you have any past criminal record or have a record of surveillance or have a connection with the terrorist group then there are strong chances that your request for a U.S. visa will be denied.
Not every crime is grounds for denial like US embassy drinks driving, but if you got convicted under drink driving then it is recommended to seek the help of immigration attorney as they are the one who can assist you about the paperwork and the documents required that are needed for visiting the US.
