.......... yea
It depends on the reason you were denied.
Yes, a US citizen can be denied entry into their own country if they have committed certain crimes or if there are concerns about their security or health.
Yes
voting in presidential elections
Yes, a US citizen can be denied entry into the United States under certain circumstances, such as if they have committed a serious crime or if there are concerns about their health or security risks.
No. They still have to apply for citizenship through the immigration office. Even if they are married the application can be denied.
No. You do not become a US citizen by marrying one. That is for you to earn by your own abilities!
A non-citzen can become a citizen in the US if they follow the proper procedures.
No
To become a representative you must be a citizen of the US for seven years.
Yes, there have been instances where US citizens have been denied entry to the US, typically due to issues with their documentation or legal status.
A United States citizen can be denied the right to vote if he or she committed a felony. This is call felony disenfranchisement. Also young people are denied the right to vote untill the age of 18.