A quick Google search turns up these recently cited reasons:
In campaigning, he stressed concern about a rise in the number of migrants passing through Slovakia to Western Europe. Fico's views reflect traditionally warm sentiments towards Russia among many Slovaks, which have gathered strength on social media since the Ukraine war started.
The Guardian said:
The 59-year-old, whose pro-Moscow stance has sparked fears Slovakia will join Hungary and its authoritarian leader Viktor Orbán in challenging the EU’s consensus on support for Kyiv, added: “People in Slovakia have bigger problems than Ukraine.”
Fico has leaned close to Orbán, who congratulated him on his victory on Sunday. “Guess who’s back!” the Hungarian prime minister said on X, formerly known as Twitter. “Always good to work together with a patriot. Looking forward to it.”
Fico said his party was “not changing [its view] that we are prepared to help Ukraine in a humanitarian way … We are prepared to help with the reconstruction of the state. But you know our opinion on arming Ukraine.”
