Donald Trump gets the Republican Party to vote against his own immigration reform. Since September, the United States Republican Party has been saying that it will not approve more aid to Ukraine if the White House does not agree to accept a law that stops illegal immigration.
The relationship between both concepts - an invasion of an allied country by a hostile power, and illegal immigration - is not based on logic, but on political strategy. What it is about is forcing Joe Biden to adopt tough measures against immigration, which will distance him from the Democratic left wing.