The PAP, or the People's action party, has won a supermajority of more than 2/3rds of seats for every election in Singapore since 1968.
However, since the 2011 elections, the PAP appears to have been slowly losing dominance. In 2011, the PAP won with only 60.14% of votes, a historic low. In 2020, while they received 61.24% of votes, they received a historically low percentage of seats, with 83/89 or 93% of elected seats going to the PAP.
One complicating factor in election predictions is that publishing opinion polls is illegal during the election campaign period. This has resulted in a dearth of information, and makes it relatively difficult to gauge the sentiment of voters.