Ukrainian President Volodymyr Zelenskyy defiantly declared Saturday that his countrymen “will not give their land to the occupier,” after President Donald Trump suggested that a peace deal would include some “swapping” of territories with Russia.

Speaking to reporters, Trump described potential land swaps as good for Ukraine, then bad, then perhaps a bit of both. He also said he was upset that Zelenskyy would need to seek constitutional approval to agree to any land swaps.