Gilmore lobbied strongly for choosing the party's nominee at a statewide convention rather than a primary, claiming that a convention would cost only $1 million versus the $4 million required to run a primary campaign. This was no small consideration, as the race for the Democratic nomination essentially ended with Mark Warner's entry into the race. It was understood that Warner would use his considerable wealth to self-finance his campaign. It was thought that a convention would favor Gilmore, since most of the delegates would come from the party's activist base, which is tilted strongly to the right. A primary was thought to favor Davis due to his popularity in voter-rich Northern Virginia; Davis is a moderate Republican, and most Republicans in Northern Virginia tend to be more moderate than their counterparts elsewhere in the state. On October 13, 2007 the state party's central committee voted 47–37 to hold a convention rather than a primary. With this decision, Gilmore said he was seriously considering a run for the Senate.