There is no available evidence in the provided sources that Lev Parnas has publicly stated that President Trump is actively seeking to rig future elections to keep the GOP in power.
Lev Parnas, father of Aaron Parnas, convict & former confidante caught in scheme that got Trump impeached, says the President is actively seeking to rig future elections to keep GOP in power

FactVerify
Source: factverify.com
What the Evidence Shows
The claim involves several components: Lev Parnas is the father of Aaron Parnas, he is a convict and former confidante involved in the scheme that contributed to Trump's first impeachment, and he has made a statement accusing the President of actively seeking to rig future elections to maintain GOP control. The search results confirm that Lev Parnas was indeed a key figure in the Trump-Ukraine scandal and was convicted of campaign finance crimes ( and 10).
Aaron Parnas, his son, is identified as a pro-Ukraine influencer on TikTok. However, none of the sources provide any direct or indirect evidence that Lev Parnas has made public statements about President Trump actively trying to rig future elections. The search results focus on Lev Parnas's conviction, his role in the impeachment scandal, and information about his son but do not include any quotes or reports about Lev Parnas making claims regarding election rigging by Trump.
Without corroborating evidence or a credible source reporting such a statement from Lev Parnas, this part of the claim cannot be verified based on the provided information.