Patel has challenged the order of the Gujarat High Court's by which it had dismissed his plea questioning the maintainability of Rajput's election petition.
The cross-examination, which remained incomplete, would continue on June 21.
Patel, a Rajya Sabha MP from Gujarat, expressed confidence that the Congress would win between "12-15" out of the 26 Lok Sabha seats in Gujarat.
The agency, in its supplementary chargesheet filed under the Prevention of Money Laundering Act (PMLA), said "a part of kickback was paid to defence officials, bureaucrats, mediapersons and important political persons of the ruling party" when the deal was being struck.
Patel was replying to a question of newsmen at Singala village in Karjan tehsil on the grenade attack in Jammu in which one person died and around 30 others were injured.
"By saying that he can't function in a coalition government has the Prime Minister confirmed that if the BJP gets less than 272 seats it will sit in Opposition and not try to form a government," Patel said on Twitter.
The issues have been framed under various sections of the Representation of the People Act, 1951.
Rajya Sabha MP Ahmed Patel quoted a minister's reply in Lok Sabha that there was no proposal to provide reservations to economically weaker sections in upper castes
The apex court declined to interfere with the October 26, 2018 order of the Gujarat High Court which had said that Rajput's allegations required a trial.
Rahul appointed former Union minister Anand Sharma as the chairperson of the party's foreign affairs.
The win for the Congress leader came after the Election Commission cancelled the votes of Congress MLAs Bhola Bhai Gohil and Raghav Bhai Patel.
Asked as to how he saw the Congress chief's comment yesterday that he was ready to occupy the prime ministerial post if the Congress emerges as the single largest party in the Lok Sabha polls, Patel said, "The Congress president has already said something. It all depends on who will get how many seats. Our candidate will be Rahul Gandhi,"
Immediately after Patel got elected, Rajput filed a petition in the HC challenging the EC's decision to invalidate votes of the two rebel MLAs.
The EC, which has been made a party to the petition along with the three winning candidates, said in its reply it stands by its order.
Here is a look at some of the instances where resort politics was used by party leaders to avoid a defection.
Omar praised the Election Commission (EC) for what he described as "withstanding the pressure from the Centre".
The Congress leader retained his place in the Rajya Sabha after the Election Commission disqualified the votes of two rebel party legislators.
A loss would not only have dented Patel's reputation, but also have seen BJP's attack reach Sonia Gandhi's doorstep.
Ahmed Patel has long been known as the 'backroom boy' of the Congress.
However, former Congress stalwart Shankersinh Vaghela, after casting his vote, told reporters, "As Ahmed Patel is going to lose, I have not given my vote to him."
While the Congress has fielded Ahmed Patel, a five term MP and the political advisor to Congress chief Sonia Gandhi, the BJP has gone ahead and put up rebel Congress leader Balwantsinh Rajput, who till recently was Congress' chief whip in the assembly.
The political secretary of Congress chief Sonia Gandhi also accused the ruling BJP of "intimidating and torturing" Congress MLAs and their families to "trigger more defections", which forced his party to shift 44 legislators to Bengaluru.
The defection of several Congress MLAs to the BJP means Patel's victory in Gujarat is far from guaranteed.
Stepping up attack on Gujarat Congress for shifting its MLAs to Bengaluru amid flood-like situation in the state, Chief Minister Vijay Rupani alleged the decision was taken by party leader Ahmed Patel out of his "greed" to win the Rajya Sabha seat.
Factors like the absence of Modi from the scheme of things in Gujarat, Patel quota agitation, Dalit unrest, anti-incumbency and want of a credible leader in the BJP could all work in Congress' favour.