As if 2019 didn’t present enough problems for Donald Trump, there are indications that he is losing Republican support. Previously compliant Senators now oppose him on a range of issues – tariffs, troop withdrawals, the shutdown. Further opposition looms if he persists with plans to call a state of emergency over funding for his wall.

With polls indicating heavy defeat in 2020, the GOP hierarchy no longer regards him as a winner. Mega-donor Charles Koch has already said he will only finance congressional candidates in 2020 – effectively an admission of defeat.

Grim 2020 prospects make a primary challenge likelier

Space is finally opening up for Republicans to criticise. If Trump’s approvals don’t significantly improve, fewer will tie their 2020 campaigns to him. The ambitious – or those predicting indictment or impeachment – could spot an unlikely route to the White House.

A primary challenge is not certain. It is abnormal, if not unknown against a sitting president. These are abnormal times though and there is already some will for a challenge.

Polls show upwards of a third of Republicans want one. Lest we forget, there was plenty of GOP opposition to Trump’s 2016 nomination. Most races were won with less than 50% and at one stage, a contested convention was heavily odds-on.

Trump remains best priced at 1/2 with Coral to be the Republican Nominee, but the value play is to find the outsider who might dare to challenge him and perhaps end up in a dual for the nomination. Here’s five to consider.

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