Face to face with emboldened Democrats, President Donald Trump called on Washington to cast aside “revenge, resistance and retribution” and end “ridiculous partisan investigations” in a State of the Union address delivered at a vulnerable moment for his presidency.

Trump appealed Tuesday night for bipartisanship but refused to yield on the hardline immigration policies that have infuriated Democrats and forced the recent government shutdown. He renewed his call for a border wall and cast illegal immigration as a threat to Americans’ safety and economic security.

Trump accepted no blame for his role in cultivating the rancorous atmosphere in the nation’s capital, and he didn’t outline a clear path for collaborating with Democrats who are eager to block his agenda. Their opposition was on vivid display as Democratic congresswomen in the audience formed a sea of white in a nod to early 20th-century suffragettes.

Trump is staring down a two-year stretch that will determine whether he is re-elected or leaves office in defeat. His speech sought to shore up Republican support that had eroded slightly during the recent government shutdown and previewed a fresh defense against Democrats as they ready a round of investigations into every aspect of his administration.