New Delhi, Aug 20 : The ruling Congress is likely to see its support erode in Chhattisgarh's northern region, where the Bharatiya Janata Party is likely to emerge as a major player with an 11 per cent vote swing in its favour, as per the ABP-CVoter Chhattisgarh Opinion Poll. In the previous election, the saffron party secured a 32.8 per cent vote share in the region. However, according to the survey, the BJP might garner a 43.8 per cent vote share this time, while the Congress may experience a decrease in vote share of more than three per cent. In the previous election, Congress obtained a 46.7 per cent vote share in the region of Chhattisgarh, whereas this time, it might be reduced to 43.3 per cent. The survey has also projected that other parties will suffer a loss of up to 7.6 per cent in vote share. In the previous election, these other parties had secured a 20.5 per cent vote share in the northern region, which is expected to decrease to a 12.9 per cent this time. /IANS