The minimum contribution level to attend the late afternoon gathering is $1,000.
Miller and Hoyer have both been on board with Clinton for some time, but the timing of the event underscores the grave challenges facing O’Malley.
On Thursday night, about an hour before the midnight filing deadline, he reported to the Federal Election Commission that his campaign had raised only $1.3 million in the previous quarter. Clinton raised $29.5 million during the same stretch, while Sen. Bernie Sanders (I-Vt.) took in $26.2 million.
Moreover, there’s been no groundswell of home-state support for O’Malley, a former two-term governor and former mayor of Baltimore. O’Malley is backed by just 4 percent of voters who are Democrats or Democratic-leaning independents in a potential presidential primary matchup in Maryland, according to Washington Post-University of Maryland poll released this week.
O’Malley boosters had been hoping Tuesday’s debate in Las Vegas -- the first for the Democratic field -- would jump-start his campaign. But so far, there’s little concrete evidence of that.
A Suffolk University/Boston Globe poll of likely Democratic voters in New Hampshire conducted after the debate showed Clinton and Sanders in a statistical dead heat in the first primary state, with Clinton drawing 37 percent support to Sanders’s 35 percent. O’Malley remained stuck at 1 percent.