Socialist leader Sanchez, who took over as prime minister earlier this month after conservative Mariano Rajoy lost a vote of confidence, criticised De Gea two years ago amid sexual assault claims against the Manchester United player.
Jose Mourinho wants to tie De Gea down to a bumper new deal, but Real Madrid are continuing to show interest.
"He is a great player, one of the best in the world", he said.
Ronaldo poses the most obvious threat to De Gea and his worldwide colleagues, with the five-time Ballon d'Or victor coming off the back of another goal-laden club season which saw him find the target 44 times across all competitions.
"My future? The important thing is the World Cup and not to think of anything else that can divert you or upset you", De Gea said.
'You have to be focused on having a good World Cup - we are all good.
Ronaldo's Portugal arrive in Russian Federation ahead of World Cup clash against Spain
Salah suffered a shoulder injury following a challenge with Real Madrid defender Sergio Ramos to cast doubt on his World Cup participation.
'But I'm always calm. Hopefully we can go far and win. Come what may, I'll be the same.
Spain will open their World Cup campaign with an intriguing contest against Portgual where De Gea will be hoping to shut Cristiano Ronaldo out.
Cristiano has been well studied, I think everyone knows what his attributes are.
People stick with the good memories, they remember the good football, but they don't know how hard it is to win a game at the European Championships or at a World Cup; it doesn't matter who you play - it's always hard because football is becoming more evenly balanced.
I'm a quiet, peaceful guy and I'm not usually affected by things - personally, I wasn't too affected by it but I have family, people who are close to me and it's not right that they should be affected.
"We have to face the game as we did in the qualifying phase, that is, playing our own game". It is true that they might ban me from the dressing room one day.
Football is football and millions of things can happen. "It is important to be focused and be 100 percent".