Can F2 visa holders engage in political activities in the US for a political party in a foreign country?

It may depend upon the nature and extent of the activity. It may not consist of employment of any kind.

Hi my sister in US has applied for petition to alien relative to sponsor me , she applied in 2015, how long will it take?

To estimate the amount of time it will take see the USDOS.gov Visa Bulletin.

Yes you may- following is USCIS guidance You may ask USCIS to expedite the adjudication of an application or petition for an immigration...

My wife got denial for H4 and she has to leave country with in a few days?

You should have an immigration attorney review the reasons for denial to see if they may be overcome. Additionally assuming your spouse is in...

If USCIS cashed your check then the application has been excepted for processing and you should expect a filing receipt within a few weeks.

The motion to reopen and reconsidered may be considered abandoned should youR spouse travel outside the United States as the underlying reason for...

Immigration?

If your spouse can be covered through you it is best to have that coverage when submitting the I 944. If coverage is not available then you may...

My visa expired and I need to go to my home country before July 13 ,2020.

If your status has not expired recommend you file for an extension of your status. The visa is not status and although the visa may be expiring it...

You should contact and Immigration attorney and resolve the paternity issue before submission.

The divorce should not in anyway impact your immigration status. Consider becoming a United States citizen.