Although the Coalition had won a comfortable majority in the House in 1949, Labor still had a four-seat majority in the Senate. Chifley thus made it his business to obstruct Menzies's agenda at every opportunity. Realizing this, Menzies sought to call a double dissolution at the first opportunity in hopes of gaining control of both houses. He thought he had his chance in 1950, when he
introduced a bill to ban the
Australian Communist Party. However, after a redraft, Chifley let the bill pass. A few months later, the Senate rejected the Commonwealth Bank Bill 1950, in which the Coalition government aimed to establish a "Commonwealth Bank Board", which Labor believed would be filled with private banking interests. This finally gave Menzies an excuse to call a double dissolution. While the Coalition lost five House seats to Labor, it still had a solid mandate. More importantly, it picked up six Senate seats, giving it control over both chambers. The 1951 election was the first double dissolution election since
single transferable vote with
proportional representation became the method for electing the Senate in 1949. With close opinion polls and no minor parties having a credible chance of winning a seat, it was feared and forecast that under the new system the Senate would finish deadlocked at 30–30, since the 54.55% majority that either major party required to win a sixth Senate seat from any single state was greater than polling margins, and there were proposals for further amendments to Senate voting rules ahead of the election, none of which were passed. In the end, Queensland and Western Australia elected 6–4 Senator majorities to the Coalition; the other states were tied 5–5. ==Results==