Canada visitor visa while Immi is in prgress.

[cmacpa]

Hello
My immigration for canada is in process from India
I am currently in US on B1 Visa
My canadian visitor visa expired I had travelled on it abt 6 times
is it possible to renew visitor visa from Buffalo for canada.
I am bit concerned they might refuse me as my Immigration is in process.
kindly advice wut to do shud I go for visitor visa or not
I dont want refusal stamp on my passport unnecessarily.
Thanks
A