Patel also praised Chief Minister Narendra Modi for leading BJP to victory through good work and people's trust in him.
"In Gujarat, we had a tie-up with Congress in order to avoid division of secular votes. However, the ally put up candidates in all the seats NCP contested. A review should be done to find out who is responsible for the defeat in Gujarat," Patel said, addressing party workers here.
NCP had contested nine seats in the assembly elections and its candidate won in two.
"Ideologically, we are with Congress and will continue to be with them. But there is nothing wrong with thinking about our growth," he said.
Modi, who powered BJP to an emphatic victory in Gujarat, received praise from Patel, NCP chief Sharad Pawar's confidant.
"Modi was successful in gaining trust of the people. Modi won due to the work he has done," he said.
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"We live in Delhi. We know that there are two-three leaders who enjoy respect of the people. And Pawar saheb is one of them. There are a lot of developments you will see in future in the country and in politics," he said, adding the era of single-party rule has ended.
"From this office, let us make efforts to put Pawar saheb in a bigger place," he said.
NCP leader Tariq Anwar, attending his first party meeting here after becoming Union minister, referred to senior Shiv Sena leader Manohar Joshi's "invitation" to Sharad Pawar to join NDA. "One should take note when even the enemy praises you," he said.