Rangers lost the initiative in the SPL title race after they were held to a draw by Motherwell at Fir Park.
Christian Dailly took advantage of a poor decision from goalkeeper Graeme Smith to head Rangers in front.
But Chris Porter stabbed home from close range to level matters early in the second half.
The beaten Uefa Cup finalists are now three points behind leaders Celtic with a game in hand. Their goal difference is also inferior to Celtic's by seven.
Rangers travel to St Mirren on Monday before ending the campaign at Pittodrie on Thursday, when Celtic visit Dundee United.
Following two defeats and two draws on their league travels, Rangers knew they could not afford another slip-up.
Walter Smith's side sta
Read more »