MILAN—Talks between BlackRock and Intesa Sanpaolo over an asset management tie-up have slowed due to political uncertainty, but the deal is not yet off, two sources familiar with the matter said on Oct. 24. BlackRock has been in talks with Intesa for more than a year to buy a minority stake in asset management unit Eurizon in a deal that would give it access to the Italian lender's distribution network.