Watch live: Trump hosts joint press conference with Polish president
Watch live: Trump holds rally in Montana
President Trump is holding a rally in Billings, Mont., on Thursday night as he seeks to boost Senate GOP candidates ahead of the November elections.
Trump is speaking amid uproar over an op-ed published anonymously in The New York Times in which a senior administration official blasted the president.
The president has slammed the unidentified official, accusing them of "treason," while various Cabinet members have rushed to denounce the op-ed.
The president's rally is scheduled to begin at 9 p.m. EST.
Watch the live video above.