Has Trump's control over the GOP in Congress waned? It's complicated.

 WASHINGTON – Republicans, led by President Donald Trump, control Congress.

Well, depending on the day.

An ever-slimming voting margin in the House of Representatives is becoming a bigger problem for the White House and House Speaker Mike Johnson. Mavericks in the Senate are increasingly voicing frustrations, too, with party leadership over issues like foreign policy and health care.

The changing political dynamics are revealing Republican divisions that threaten to derail what could be Trump's last chance to pass significant legislation if Democrats win control of at least one house of Congress in November.

To kick off the important year heading into the midterm elections, the president in the first week of January rallied GOP lawmakers at a retreat in Washington. In a speech to the crowd of House Republicans, he stressed they have "so many good nuggets," to campaign on this year. In particular, he highlighted revenue brought in from tariffs and the White House's negotiations to bring down prescription drug prices."If you can sell them, we’re going to win,” he said.

Yet the chances of Republicans holding on to the House in the midterms, which would buck historical trends, are looking worse. A YouGov/Yahoo News poll of more than 1,100 voters in January showed Democrats with a five-point lead.

Trump has already acknowledged the voting math in Congress is becoming less forgiving.