Donald Trump has told the "Fox and Friends" programme that he believes the US is at risk of becoming a one party political system with him as President.

In an interview aired on Tuesday morning, Mr Trump criticised the House of Representatives Democrat leader Nancy Pelosi as "incompetent".

He said the Democrat party, which is now in the minority in both House and Senate, was at risk under her leadership. The Republican nonetheless added that he "likes" a two party system.

He said: "I’ve been watching Nancy’s statements and I think she’s incompetent actually. If you look at what’s been going on with the Democrats, the party, it’s getting smaller and smaller.

"In a certain way I hate to see it because I like a two party system. We’re soon going to have a one party system. I actually think a two party system is healthy and good."

Mr Trump's comments could undermine efforts by the White House to present his address to Congress on Tuesday night as an opportunity to reset his relationship with lawmakers.

The address, which Trump has been writing with aide Stephen Miller and others, will include some gestures toward unifying a polarised country as he tries to bind the wounds from a bitterly fought election, aides have told reporters.

Mr Trump's speech is not being labeled a State of the Union address because he has had so little time in office so far.

Democratic lawmakers will not boycott the speech, according to congressional aides. Instead, they plan to attend the speech and give their reactions to reporters afterward, as is the custom at such events.

But they are expected to find a number of ways to express their displeasure with the Trump administration so far.

At least one - Representative Luis Gutierrez of Illinois - has told reporters he will protest Mr Trump’s speech by refusing to applaud or give him a standing ovation, another custom at presidential speeches.

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Others have extended invitations to members of the public who, through their presence in the visitors' galleries, will offer their own rebuke to the President's policies.

They include Democratic Senator Dick Durbin of Illinois, who has invited Aaima Sayed, a participant in an Obama administration programme deferring the deportation of youths brought to the US illegally.

Tim Albrecht, a Republican strategist in Iowa, told the Reuters news agency there were no guarantees Mr Trump would stick to a conciliatory script.

"Despite those at home or in the audience, he’s going to put forward what he believes needs to be done just as he did in the two years he ran for president," he said.

"As with everything in Trump land, conventional wisdom is thrown out the window."