The JMM patriarch, who was a towering figure in Jharkhand's political landscape, was admitted to the Sri Ganga Ram Hospital in the national capital since last month with a kidney-related issue.
The JMM also demanded a ban on electronic gadgets near the counting centres.
Shah raised concerns about infiltrators marrying local women to gain control of their land.
The assembly polls will be held in two phases — on November 13 and 20 — while the results will be declared on November 23.
Champai Soren said in a social media post that the options of retiring from politics, finding a new political companion and launching his own political outfit remain open to him.
The JMM-led government in Jharkhand headed by Chief Minister Hemant Soren on Monday won the vote of confidence in the assembly amid a walkout by opposition members. A total of 45 MLAs, including nominated member Glen Joseph Galstaun, voted in favour of the confidence motion. BJP and AJSU legislators walked out of the House as the headcount for voting started. The BJP-led opposition has 24 legislators of the saffron party and three of the AJSU Party.
In a significant ruling, a seven-judge Constitution bench of the Supreme Court last month overturned a 1998 decision that had provided lawmakers with immunity from prosecution for accepting bribes in exchange for making speeches or casting votes in the legislature.
Hemant Soren’s choice of veteran Champai Soren as his replacement, while made under duress, could help the JMM-alliance in an election year. Champai’s elevation is a departure from the usual script of family-run parties, but BJP will fancy its chances in the upcoming elections, or even sooner
JMM, part of opposition INDIA, criticizes Bihar CM Nitish Kumar, labeling "betrayal" as his political trait.
About 26 per cent of Jharkhand's population are tribals, and JMM banks on this vote for electoral success.