JOHN McVeigh says he's getting "on with the job" as a critical pre-selection party vote looms this weekend.

Liberal National Party members in Groom will this weekend vote on whether to keep Dr McVeigh as their candidate or replace him with Toowoomba businessman Isaac Moody.

Mr Moody earlier this month sensationally indicated he would challenge Mr McVeigh, who is the Minister for Regional Development, Territories and Local Government, for pre-selection.

The vote is scheduled for Saturday.

Mr Moody claimed Mr McVeigh betrayed the trust of Groom voters when he supported same-sex marriage last year, despite a slim margin of the electorate voting No at the plebiscite.

Flanked by Acting Prime Minister Michael McCormack on a fly-by tour of Toowoomba today, Mr McVeigh said any commentary ahead of this weekend's pre-selection vote was a matter for the LNP state president.

"I think it's a tremendous day when we have the acting prime minister here in Toowoomba only a couple of months after the prime minister was here back on the first of February," he said.

"As Michael McCormack has said, Toowoomba is an exemplar for the rest of regional Australia in terms of regional development, job creation.

"In terms of any issues within the LNP in Queensland, here in Groom, I leave commentary of that to our party president."