“Is this possible without consent from the Congress?”
Nope....However, we have W. Virginia *ahem*
George Allen (the Governor) made a quip about WV being the “unconstitutionally formed part of Virginia” during a WVU-UVA football game.
Here’s how you do it.
The 2nd Amendment counties have a convention & send delegates. Vote a bill of succession have it endorsed by the state legislatures of those counties. Present it & the WV proclamation welcoming them to Trump. Trump tweets about how similar western Virginia (the 2nd Amendment counties) & WV are in culture and outlook. How low crime they are compared the liberal dominated areas.
Cook popcorn, get a cool drink & watch the liberal fireworks!
To leave one state and to become a part of another already existing state, you don't need Congressional approval.