What is the fine-grained topic of the following text: According to this source, Deputy Prime Minister Matteo Salvini, who has led the tough wing of the Government in its relationship with Brussels, has opened the possibility of the 2019 Budget to undergo some tinkering in order to reassure international investors. Only return the topic.
Possibility of adjustments in the 2019 Budget by Deputy Prime Minister Matteo Salvini to reassure international investors.