Can i withdraw a petition for my sibling because he is now married to US citizen?

There is no need to withdraw the sibling petition. It will not negatively impact his future petition

Can I enter US without my EAD card?

In general, you can re-enter the US without your EAD card. The exception would be if your EAD is a "combo card", i.e. issued pursuant to a 485...

I am on f-1 OPT status got married to citizen and my EAD will expire in July

Your wife can sponsor you if she is a USC. There are a number of forms to file and number of timing considerations. Highly advisable that you...

Can I enter the US again with a B1/B2 visa and has filed an asylum a while ago i.e. with pending asylum

US Customs may refuse entry if the purpose for traveling is inconsistent with the travel document presented. I.e. if you present a visitor visa for...

You can certainly apply, but will need convincing proof that your trip will be temporary and you will return to Columbia. The fact that you were...

Did you change your last name from the initial filing following the marriage?

I agree with my colleague who previously answered your question. The best course of recourse would be to consult with an immigration attorney to...

I am applying for an E-2 visa in a few weeks. Am I allowed to travel to the US as a visitor prior to applying?

Yes, as a Citizen of Canada, you are eligible to travel to the US as a business visitor while your E-2 visa application is in process, so long as...

I-131 Expedite criteria?

It is possible that it could qualify, the decision to expedite is entirely in USCIS' discretion and they will review the facts of these requests on...

Can I receive a E1 if I was appointed Honorary Consul (prob. youngest in the world 28), member of Int Orgs + MSc degree?

It is possible, I recommend that you consult with an immigration attorney for a complete case assessment